Yahya related to me from Malik that Muhammad ibn Abd ar-Rahmanibn Nawfal said, ''Urwa ibn az-Zubayr informed me from A'isha umm al-muminin that Judama bint Wahb al-Asadiyya informed her that she heardthe Messenger of Allah, may Allah bless him and grant him peace, say,'I intended to prohibit ghila but I remembered that the Greeks andPersians do that without it causing any injury to their children.' "Malik explained, "Ghila is that a man has intercourse withhis wife while she is suckling."
USC-MSA web (English) reference: Book 30, Hadith 16
Arabic reference: Book 30, Hadith 1291