It is narrated from Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) came to me while I was blowing on a pot for my companions, and my head and beard were filled with lice. The Prophet (peace and blessings be upon him) held my forehead and said: "Shave these hairs and observe three fasts, or feed six needy people." And the Messenger of Allah (peace and blessings be upon him) knew that I did not have anything for sacrifice.

Imam Malik, may Allah have mercy on him, said: No person should give the compensation for «أذي» unless he commits a fault, because committing a fault makes expiation obligatory, and he has the choice to give the compensation by sacrifice, or by fasting, or by charity, whether in Mecca or in any other city.

Imam Malik, may Allah have mercy on him, said: It is not permissible for any Muhrim to pluck, shave, or shorten his hair until he has exited the state of Ihram, except in the case where there is harm to his head, then a fidya will be obligatory, as Allah, Glorified and Exalted is He, has commanded. And it is not permissible for a Muhrim to cut his nails, kill lice, remove lice from his head and throw them on the ground, or remove lice from his body or clothes. If he does so, he should give a handful of grain in charity for the sake of Allah.

Imam Malik, may Allah have mercy on him, said: Whoever plucks the hair of his nose, or his armpits, or applies depilatory to his body, or has a wound on his head and shaves his head out of necessity, or shaves the hair of his nape for cupping while in the state of ihram, if he does any of these things out of forgetfulness or ignorance, then in all these cases, he must offer a fidya (compensation). And it is not permissible for a person in ihram to shave the place for cupping.

Imam Malik, may Allah have mercy on him, said: Whoever shaves his head before throwing the pebbles out of ignorance must offer a fidya (compensation).