The Messenger of Allah ﷺ was in my house when an Arabi came and said, "Messenger of Allah, I had a wife, and then I married another woman alongside her. My first wife claims she nursed my new wife with one or two sucklings."Mura, on one occasion, said, "one or two breastfeedings."He replied, "One or two sucklings do not establish a prohibition," or he said, "one or two breastfeedings."
حدثنا إسماعيل قال حدثنا أيوب عن أبي الخليل عن عبد الله بن الحارث الهاشمي
كان رسول الله ﷺ في بيتي فجاء أعرابي فقال يا رسول الله كانت لي امرأة فتزوجت عليها امرأة أخرى فزعمت امرأتي الأولى أنها أرضعت امرأتي الحدثى إملاجة أو إملاجتين وقال مرة رضعة أو رضعتين فقال لا تحرم الإملاجة ولا الإملاجتان أو قال الرضعة أو الرضعتان
Its isnad is sahih. Abul-Khalil is Salih bin Abu Maryam Dubai, and Abdullah bin Harith is Ibn Nawfal Hashimi, and both are reliable, their hadith appearing in the collections of all the major compilers. The hadith was mentioned earlier at 25977, and see also 16066.