Musannaf Ibn Abi Shaybah

Hazrat Umar bin Zar states that I asked Hazrat Mujahid and Hazrat Ata that if a person in the state of Ihram performs ablution and, while combing his beard with his fingers, some hairs fall out, both of them replied: There is nothing (no penalty) upon him.

Hazrat Salim was asked whether a person in the state of Ihram may touch his beard and if, as a result, the hair of his beard falls out? He replied, "Uf, Uf," (he expressed dislike for asking such a question).

Hazrat Muhammad bin Ali (may Allah be pleased with him) and Hazrat Ibn Aswad were asked whether a person in the state of Ihram performs ablution and combs his beard during ablution, causing some hairs of his beard to fall out? They replied: There is nothing (no penalty) upon him.