Judama daughter of Wahb said

I was with Allah's Messenger ﷺ 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 Allah's Messenger ﷺ 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. Muslim transmitted it.