It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that when the Messenger of Allah (peace and blessings be upon him) performed ablution, he would take water in his palm, put it under his chin, then pass it through his beard, and say: "This is how my Lord has commanded me."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 247