Running the fingers through the beard three times

Shaqiq bin Salamah relates: I saw Sayyiduna Uthman (may Allah be pleased with him) perform ablution. He washed his face, sniffed water into his nose and rinsed his mouth three times, wiped his head and ears, outside and inside, and passed his fingers through his beard three times when washing his face, before washing his feet. Then he said: I saw the Messenger of Allah (peace and blessings be upon him) do just as you have seen me do.
The two Shaykhs agreed on recording routes of the hadith of Uthman describing his ablution, but they did not mention combing through the beard three times in their narrations. This chain is sahih (authentic), and the two Shaykhs used all its narrators as evidence except Amir bin Shaqiq, and no criticism of him is known. Its supporting report on combing through the beard is also narrated from Sayyiduna Ammar bin Yasir, Sayyiduna Anas and Sayyidah Aishah (may Allah be pleased with them).

Hassan bin Bilal relates that he saw Sayyiduna Ammar bin Yasir (may Allah be pleased with him) performing ablution, and he combed through his beard. He was asked: "Do you comb through your beard?" He said: "What could stop me from doing so, when I myself have seen the Messenger of Allah (peace and blessings be upon him) comb through his beard?"

Sayyiduna Anas bin Malik (may Allah be pleased with him) relates: I saw the Prophet (peace and blessings be upon him); he (peace and blessings be upon him) performed ablution and combed through his beard from underneath with his fingers, and said: "This is what my Lord has commanded me."

Sayyiduna Anas bin Malik (may Allah be pleased with him) relates: I saw the Prophet (peace and blessings be upon him); he (peace and blessings be upon him) performed ablution, combed through his beard and said: "This is how my Lord has commanded me."

Sayyidah Aishah (may Allah be pleased with her) relates that whenever the Messenger of Allah (peace and blessings be upon him) performed ablution, he would comb through his beard.