A person in ihram trimming the moustache or hair of someone not in ihram

Khusayf said: While I was in the state of ihram, I trimmed the moustache of Muhammad bin Marwan. Then I asked Sa'id bin Jubayr, and he ordered me to give one dirham in charity.

Mujahid was asked: What if a person in ihram trims the moustache of someone not in ihram? He said: He should give one dirham in charity.

Al-Hasan disliked that one in the state of ihram should cut the hair or nails of someone not in ihram.

Amr bin Dinar said: Someone who saw it informed me that one of our predecessors, while in the state of ihram, shortened the hair of Jabir bin Zayd, and he came out of ihram.

It is narrated from Ikrimah that a woman in ihram may comb the hair of a woman not in ihram, and may kill the other's lice.