It is narrated from Hazrat Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) used to drink water in three breaths and said that this method is easier, more pleasant, and more beneficial.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 12923
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد حسن، م: 2028