2:185Ramadan is the month in which the Quran was revealed. Guidance for humanity, and clear portents of guidance, and the Criterion. Whoever of you witnesses the month, shall fast it. But whoever is sick, or on a journey, then a number of other days. God desires ease for you, and does not desire hardship for you, that you may complete the number, and celebrate God for having guided you, so that you may be thankful.

2:194The sacred month for the sacred month; and sacrilege calls for retaliation. Whoever commits aggression against you, retaliate against him in the same measure as he has committed against you. And be conscious of God, and know that God is with the righteous.

2:197The Hajj is during specific months. Whoever decides to perform the Hajj—there shall be no sexual relations, nor misconduct, nor quarrelling during the Hajj. And whatever good you do, God knows it. And take provisions, but the best provision is righteousness. And be mindful of Me, O people of understanding.

2:217They ask you about fighting during the Holy Month. Say, “Fighting during it is deplorable; but to bar others from God’s path, and to disbelieve in Him, and to prevent access to the Holy Mosque, and to expel its people from it, are more deplorable with God. And persecution is more serious than killing. They will not cease to fight you until they turn you back from your religion, if they can. Whoever among you turns back from his religion, and dies a disbeliever—those are they whose works will come to nothing, in this life, and in the Hereafter. Those are the inmates of the Fire, abiding in it forever.

2:226Those who vow abstinence from their wives must wait for four months. But if they reconcile—God is Forgiving and Merciful.

2:234As for those among you who die and leave widows behind, their widows shall wait by themselves for four months and ten days. When they have reached their term, there is no blame on you regarding what they might honorably do with themselves. God is fully acquainted with what you do.