Abu Karayb, Muhammad bin al-'Ala' محمد بن العلاء - أبو كريب · Medicine (Kitab Al-Tibb)

I intended to prohibit suckling during pregnancy (ghailah), but I considered the Greeks and the Persians and saw that they practiced it, without any injury being caused to their children thereby. Malik said : Ghailah means that a man has intercourse with a women while she is suckling a child.