Whenever the Messenger of Allah ﷺ was brought milk, he would say, "A blessing, or two blessings."
حدثنا أبو كريب حدثنا زيد بن الحباب عن جعفر بن برد الراسبي حدثتني مولاتي أم سالم الراسبية قالت سمعت
كان رسول الله ﷺ إذا أتي بلبن قال بركة أو بركتان
No references are available.
[Its isnad is daif] Ahmad reported it: 6/145, from the hadith of Jafar bin Burd, through him. Umm Salim, I did not find anyone who verified her as reliable.