Muwatta Malik, 105

Yahya related to me from Malik from Yahya ibn Said from Abdullah ibn Kab, the mawla of Uthman ibn Affan that Mahmud ibn Labid al-Ansari asked Zayd ibn Thabit about a man who penetrated his wife but became listless and did not ejaculate. Zayd ibn Thabit said, "He does ghusl." Mahmud said to him, "Ubayy ibn Kab used not to think that ghusl was necessary," but Zayd ibn Thabit said, "Ubayy ibn Kab drew away from that before he died

Mahmoud Ibn Zoubaid Al- Ansari a demandé Zaid Ibn Thabet «au sujet de l'homme qui a eu un rapport charnel avec sa femme puis il cesse sans éjaculer (que doit-il faire dans ce cas)»? Zaid lui répondit: «qu'il, fasse une lotion». Mahmoud répliqua «mais Oubai Ibn Ka'b ne trouve pas que la lotion est d'obligation». Zaid rétorqua: «Oubai Ibn Ka'b avait changé d'avis avant de mourir»