by Imam Malik, translation by A'isha `Abdarahman at-Tarjumana and Ya`qub Johnson , Volume: Hajj
Chapter: Cutting the Hair
Yahya related to me from Malik from Nafi that if Abdullah ibn Umar had finished the fast of Ramadan and intended to do hajj, he would not cut his hair or beard at all until he had done hajj.
Malik said, "It is not necessary for people to do the same."
Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to trim his beard and moustache when he shaved at the end of a hajj or umra.
Yahya related to me from Malik from Rabia ibn Abi Abd ar-Rahman that a man came to Qasim ibn Muhammad and said, "I did the tawaf al-ifada along with my wife, and then I went off onto a mountain path and approached my wife to make love to her, and she said, 'I have not cut my hair yet.' So I bit some of her hair off with my teeth and then had intercourse with her." Qasim laughed and said, "Tell her to cut her hair with some scissors."
Malik said, "To my liking an animal should be sacrificed in an instance such as this, because Abdullah ibn Abbas said, 'Whoever forgets any of his rites on hajj should sacrifice an animal.' "
Yahya related to me from Malik from Nafi that Abdullah ibn Umar once met a relative of his called al-Mujabbar who had done the tawaf al-ifada but, out of ignorance, had not shaved his head or cut his hair. Abdullah told him to go back and shave his head or cut his hair, and then go back and do the tawaf al-ifada.
Yahya related to me from Malik that he had heard that when Salim ibn Abdullah intended to go into ihram he would call for some scissors and trim his moustache and beard before setting off and before going into ihram.