God’s Messenger received the revelation, “Your wives are a tilth to you, so come to your tilth . . .” (Al-Qur’an 2:223) that means from in front or behind, but avoid the anus and intercourse during menstruation.
Abu Sa'id al-Khudri reported God's Messenger as saying, “The most serious breach of trust in God’s sight on the day of resurrection ...” A version has, “Among those who will have the worst position in God’s sight on the day of resurrection is the man who has intercourse with his wife, and she with him, and then spreads her secret.”*
* i.e. talks about the subject to others, or tells people about defects or beauties he has found in her.
I was with God’s Messenger along with some people when he was saying, “I intended to prohibit suckling during pregnancy* but I considered the Greeks and the Persians and saw that they suckled their children during pregnancy without any injury being caused to their children thereby.” Then they asked him about withdrawing the penis and God’s Messenger replied, “That is the secret burying alive” and reference is made to it in the words, “When the girl buried alive will be asked (Al-Qur’an 81:8).”
*(Ghila. It means either suckling during pregnancy, or intercourse with a woman while she is suckling a child.
