Sayyiduna Ka'b bin Amr al-Yami (may Allah be pleased with him) said: I went in to the Prophet (peace and blessings be upon him) while he (peace and blessings be upon him) was performing ablution (wudu), and the water was flowing from his (peace and blessings be upon him) face onto his (peace and blessings be upon him) beard and chest. He (peace and blessings be upon him) would do the rinsing of the mouth and the rinsing of the nose separately.
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16459