Another chain from Anas bin Malik: "The Prophet (ﷺ) would breathe three times in the vessel."
He said: This Hadith is Hasan Sahih.
In-book : Book 26, Hadith 25
English translation : Vol. 3, Book 24, Hadith 1884
26. The Book on Drinks
باب مَا جَاءَ فِي الاِسْتِنْجَاءِ بِالْحَجَرَيْنِ