Sahih Muslim Book 8, Hadith Number 3393.

Chapter: Permissibility of intercourse with a suckling lady and disapproval of ‘Azl.

Judama bint Wahb al-Asadiyya (Allah be pleased with her) reported: I heard Allah’s Messenger (May peace be upon him) saying this. The rest of the hadith is the same concerning ‘azl and ghila (cohabitating with a suckling woman), but with a slight variation of words.