Among His signs is [the fact] that He has created spouses for you among yourselves so that you may dwell in tranquillity with them, and He has planted love and mercy between you; In that are signs for people who reflect. Qur'an [30 : 21]
and says: ... they are a garment for you and you are a garment to them ... Qur'an [2 : 187]
Consider this in conjunction with the following verse: ... the best garment is the garment of God-consciousness ... Qur'an [7 : 26]
It requires that a husband and wife should be as garments for each other. Just as garments are for protection, comfort, show and concealment for human beings, Allah expects husbands and wives to be for one another. And the believers, men and women, are protecting friends of one another; they enjoin the right and forbid the wrong, and they establish worship and they pay the poor-due, and they obey Allah and His messenger; as for those, Allah will have mercy on them; Lo! Allah is Mighty, Wise. Allah hath promised to believers - men and women - gardens underwhich rivers flow, to dwell therein, and beautiful mansions in gardens of everlasting bliss; but the greatest bliss is the good pleasure of Allah: This is the supreme felicity.