Well, here's the thing: Unless your husband died and rose with Y'shua on the day of the resurrection, then he's not eligible to refuse to wear tzit-tzit. Y'shua wore tzit-tzit BEFORE His death, and until your husband dies, he is supposed to wear them, too! Why? Because YHWH said so! Tzit-tzit are a REMINDER for us to be holy!
Numbers 15: 37 ADONAI said to Moshe, 38 "Speak to the people of Isra'el, instructing them to make, through all their generations, tzitziyot on the corners of their garments, and to put with the tzitzit on each corner a blue thread. 39 It is to be a tzitzit for you to look at and thereby remember all of ADONAI's mitzvot and obey them, so that you won't go around wherever your own heart and eyes lead you to prostitute yourselves; 40 but it will help you remember and obey all my mitzvot and be holy for your God. 41 I am ADONAI your God, who brought you out of the land of Egypt in order to be your God. I am ADONAI your God."
Note that "the people is Israel through all their generations" are to wear tzit-tzit. This includes ALL believers in YHWH! Yeshua wore them, as did all His followers. Why? Because Torah instructed it! The Gentiles who have accepted YHWH and His Divine Messiah have "crossed over" to become "Hebrews" - and as such, they are part of Israel - and YHWH commanded ALL Israel to be Torah observant (Numbers 15:13-16)
Many people are too blind to realize that one can't truly understand the New Testament until they have a good grasp of the "Old". Yeshua didn't come to bring a new religion and He didn't stop being YHWH's Son after his death, and he didn't stop being a Torah observant Jew, and he didn't enter the presence of the two Marys or the Apostles wearing jeans and a t-shirt.
As our Final SIN Sacrifice, He took away our certificate of debt; not the need to obey his Father's Torah!
Please tell your husband to follow this train of thought he can know how and why Yeshua continues to wear tzit-tzits:
The woman with the issue of blood touched Yeshua’s tzit-tzit, not actually "the hem" of his garment. That woman desperately wanted healing - enough to cause her to defy the laws of impurity to touch Yeshua's covering garment (remember, women used to have to sleep "outside the camp" during their menstrual cycles). The actual Aramaic word was not "hem" but "edge" which referred to the fuzzy "borders" or kanaf, which is where tzit-tzit are placed (Numbers 15:38-39). Yeshua, like all other Torah observant Jews, wore tzit tzit as a reminder to do the Commandments of YHWH, and not seek after what is right in one's own eyes.
Zechariah 8: 23 ADONAI-Tzva'ot says, 'When that time comes, ten men will take hold - speaking all the languages of the nations - will grab hold of the cloak (tallit - prayer shawl) of a Jew and say, "We want to go with you, because we have heard that God is with you."'" (CJB)
Malachi 4: 1 For the day is coming, burning like a furnace, when all the proud and evildoers will be stubble; the day that is coming will set them ablaze," says ADONAI-Tzva'ot, "and leave them neither root nor branch. 2 But to you who fear my name, the sun of righteousness will rise with healing in its wings; and you will break out leaping, like calves released from the stall. 3 You will trample the wicked, they will be ashes under the soles of your feet on the day when I take action," says ADONAI-Tzva'ot.
Take a moment to think about the "wings": If a man spreads out his arms while he is wearing his tallit, it makes him look as though he has "wings"....Every tallit has tzit-tzit - and Yeshua will be wearing His upon His return on that white horse. After all, He was a Jew, and Jews don’t pray or perform holy tasks unless they are wearing their tallits, which serves as their covering before YHWH!
Revelation 19: 11. And I saw heaven opened: and lo, a white horse; and he that sat on it is called Faithful and True: and in righteousness he judges, and makes war. 12. His eyes (were) like a flame of fire, and on his head (were) many diadems; and he had names inscribed; and the name which was written on him, no one knew, except himself. 13. And he was clothed with a vesture (covering garment) sprinkled with blood; and his name is called, The Word of Elohim. 14. And the army of heaven followed him on white horses, clad in garments of fine linen, pure (and) white. 15. And from his mouth issued a sharp two-edged sword, that with it he could strike the nations; and he will rule the nations with a rod of iron; and he will tread the wine-press of the wrath of Elohim Almighty. 16. And he has upon his vesture and upon his thigh the words written: King of Kings, and Master of Masters. (AENT)
The Bible tells us that when Yeshua returns as "The Word of Elohim" and "King of Kings, and Master of Masters" (Rev. 19:11-13,16), He will have the Name of God written on His thigh. And no, the Name written on Yeshua’s thigh is not a tattoo, as some might think...Jews would never abuse the Name of YHWH by writing it into their flesh!
Every letter of the Hebrew alphabet has a numerical value, and the knots on the tzit-tzit on the four corners of a tallit spell out the name of YHWH!!! (Sephardics tie the knots in windings of 10, 5, 6, 5 which spells out the numeric values of "YHWH" but the Ashkenazies use windings of 7, 8, 11, 13 which, adds up to 39, which is the numerical equivalent of Deuteronomy 6:4 which cites the Shema.)
In Yeshua's case, the Bible tells us He will be wearing the Name of God....And where will Yeshua’s tzit-tzits fall while He is sitting on a horse, wearing His tallit? Across His THIGH!
For those who insist that women are NOT to wear tzit-tzit, please check out Numbers 15:38-41.
Numbers 15: 37 ADONAI said to Moshe, 38 "Speak to the people of Isra'el, instructing them to make, through all their generations, tzitziyot on the corners of their garments, and to put with the tzitzit on each corner a blue thread. 39 It is to be a tzitzit for you to look at and thereby remember all of ADONAI's mitzvot and obey them, so that you won't go around wherever your own heart and eyes lead you to prostitute yourselves; 40 but it will help you remember and obey all my mitzvot and be holy for your God. 41 I am ADONAI your God, who brought you out of the land of Egypt in order to be your God. I am ADONAI your God."( CJB)
Aramaic scholar Andrew Gabriel Roth explains: Some versions say "sons." The Hebrew word B'NAY does in fact mean "sons" literally. However, the Rabbis admit there are times when it can be argued it's a mixed gender group and the term does not "turn" female until the whole group is designated "female". It is true also that a clearer word for "people" in Hebrew would be AM (people), but that doesn't mean B'NAY always and only means "sons"; it is a matter of interpretation that may never be resolved. However, there is nothing in the Torah that FORBIDS women specifically from wearing tzit-tzit either, and therefore, worst case, it is OPTIONAL for women to do so - but not a violation of Torah IF they opt to do so.