The ruling on a pilgrim shaving his head before confirming the slaughter of his 'Id sacrifice

Question:
He says: Honorable Shaykh, may Allah grant you success, a man wants to perform Hajj and wants to offer a sacrifice. Is it permissible for him to shave his head on the day of 'Id before he is certain that his sacrifice has been slaughtered, or not?

Answer:
He shaves in order to exit the state of ihram, but he does not cut his nails, nor trim his mustache, nor shave his armpits until he is certain that the sacrifice has been slaughtered. As for shaving his head in order to exit the state of ihram, this is an act of worship that does not cause harm, if Allah wills.