2:187Permitted for you is intercourse with your wives on the night of the fast. They are a garment for you, and you are a garment for them. God knows that you used to betray yourselves, but He turned to you and pardoned you. So approach them now, and seek what God has ordained for you, and eat and drink until the white streak of dawn can be distinguished from the black streak. Then complete the fast until nightfall. But do not approach them while you are in retreat at the mosques. These are the limits of God, so do not come near them. God thus clarifies His revelations to the people, that they may attain piety.

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

2:240Those of you who die and leave wives behind—a will shall provide their wives with support for a year, provided they do not leave. If they leave, you are not to blame for what they do with themselves, provided it is reasonable. God is Mighty and Wise.