24:27O you who believe! Do not enter homes other than your own, until you have asked permission and greeted their occupants. That is better for you, that you may be aware.

24:28And if you find no one in them, do not enter them until you are given permission. And if it is said to you, “Turn back,” then turn back. That is more proper for you. God is aware of what you do.

24:33And let those who do not find the means to marry abstain, until God enriches them from His bounty. If any of your servants wish to be freed, grant them their wish, if you recognize some good in them. And give them of God’s wealth which he has given you. And do not compel your girls to prostitution, seeking the materials of this life, if they desire to remain chaste. Should anyone compel them—after their compulsion, God is Forgiving and Merciful.

24:39As for those who disbelieve, their works are like a mirage in a desert. The thirsty assumes it is to be water. Until, when he has reached it, he finds it to be nothing, but there he finds God, Who settles his account in full. God is swift in reckoning.

24:62The believers are those who believe in God and His Messenger, and when they are with him for a matter of common interest, they do not leave until they have asked him for permission. Those who ask your permission are those who believe in God and His Messenger. So when they ask your permission to attend to some affair of theirs, give permission to any of them you wish, and ask God’s forgiveness for them. God is Forgiving and Merciful.