It is narrated from al-Nazzal bin Sabrah and Masruq bin al-Ajda' that Ali (may Allah be pleased with him) said: "There is no fosterage after weaning."
This hadith is mawquf (stopping at the Companion), and it has also been narrated as marfu' (attributed to the Prophet).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الرضاع / 15657