Marwan bin Al-Hakam asked Sayyiduna Abu Sa'id Al-Khudri, may Allah be pleased with him: Did you hear the Messenger of Allah, peace and blessings be upon him, forbidding blowing into water? He replied: Yes, (I heard it).
Hadith Referenceسنن دارمي / من كتاب الاشربة / 2170
It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Noble Prophet (peace and blessings be upon him) forbade blowing into a drink.
Hadith Referenceسنن دارمي / من كتاب الاشربة / 2171