The Cow - 2:223
Your women are your fields (in which you sow). Reach your fields as you wish. Prepare for yourselves for the future. Listen to Allah and know that you will surely meet Him. Give good news to those who believe.
Related to sexual intercourse:
The Cow/2:222
"They ask you about menstruation, Say: "It is an inconvenience. Do not have sexual intercourse with menstruating women and do not approach them until they are free from it. When they are free from it, then have sexual intercourse with them in the place that Allah permits you. Allah loves those who turn, and He loves the purified."
The Cow/2:223
Your women are your fields (in which you sow). Reach your fields as you wish. Prepare for yourselves for the future. Listen to Allah and know that you will surely meet Him. Give good news to those who believe.
The Women/4:43
Believers! Do not stand in prayer while intoxicated until you know what you say, and do not pray until you have washed after sexual intercourse, except for those who are travelers. And if you are sick or a pilgrim, or if one of you has come from the toilet, or if you have had sexual intercourse with women and have not found water, then do tayammum by touching a clean and dry earth and rubbing it on your face and hands. Allah Forgives, Forgives.
The Table Spread/5:6
Believers! When you rise for prayer, wash your faces and your hands up to the elbows. Splash your head, and your feet up to the heels, and wash if you have had sexual intercourse. And if you are sick or a traveler, or you have come from the toilet, or you have had sexual intercourse with women and you cannot find water, then turn to a clean piece of earth and rub your face and arms with it. Allah does not wish to cause you any hardship. He only wants to purify you and complete His favor upon you. That you may give thanks.
The Cow/2:187
It has been made lawful for you to have sexual intercourse with your women on the nights of fasting. They are your coverings and you are their coverings. Allah knew that you were deceiving yourselves, so He accepted your repentance and forgave you. Now you may have sexual intercourse with them as Allah has determined for you. Eat and drink until you can distinguish between the white and black threads of dawn. Then complete the fast until the night. Do not have sexual intercourse with them while they are confined in the mosques. These are the limits set by Allah; do not transgress them. This is how Allah reveals His verses to the people for their protection.