Amr bin Shuaib on his father's authority said that his grandfather (Abdullah ibn Amr ibn al-As) reported the Prophet ﷺ said: If one of you marries a woman or buys a slave, he should say: "O Allah, I ask You for the good in her, and in the disposition You have given her; I take refuge in You from the evil in her, and in the disposition You have given her. " When he buys a camel, he should take hold of the top of its hump and say the same kind of thing. Abu Dawud said: Abu Saeed added the following words in his version: He should then tale hold of her forelock and pray for blessing in the case of a woman or a slave.

Ibn Abbas reported the Prophet ﷺ as saying “If anyone who means to have intercourse with his wife says “In the name of Allaah, O Allaah, keep us away from the devil and keep the devil away from what You hast provided us. ” It will be ordained that no devil will ever harm the child born to them.

Narrated Abu Hurairah: The Prophet ﷺ said: He who has intercourse with his wife through her anus is accursed.

Muhammad bin Al Munkadir said I heard Jabir say The Jews used to say “When a man has intercourse with his wife through the vagina, but being on her back the child will have a squint, so the verse came down. Your wives are a tilth to you, so come to your tilth however you will. ”

Narrated Abdullah Ibn Abbas: Ibn Umar misunderstood (the Quranic verse, "So come to your tilth however you will")--may Allah forgive him. The fact is that this clan of the Ansar, who were idolaters, lived in the company of the Jews who were the people of the Book. They (the Ansar) accepted their superiority over themselves in respect of knowledge, and they followed most of their actions. The people of the Book (i. e. the Jews) used to have intercourse with their women on one side alone (i. e. lying on their backs). This was the most concealing position for (the vagina of) the women. This clan of the Ansar adopted this practice from them. But this tribe of the Quraysh used to uncover their women completely, and seek pleasure with them from in front and behind and laying them on their backs. When the muhajirun (the immigrants) came to Madina, a man married a woman of the Ansar. He began to do the same kind of action with her, but she disliked it, and said to him: We were approached on one side (i. e. lying on the back); do it so, otherwise keep away from me. This matter of theirs spread widely, and it reached the Messenger of Allah ﷺ. So Allah, the Exalted, sent down the Quranic verse: "Your wives are a tilth to you, so come to your tilth however you will, " i. e. from in front, from behind or lying on the back. But this verse meant the place of the delivery of the child, i. e. the vagina.