Is it permissible for a pilgrim on 'umrah or hajj to shave his hair for himself or have another pilgrim do it for him after finishing the rites?

Due to the absence of any prohibiting text, there is nothing to prevent a pilgrim on 'umrah from shaving or shortening his hair or having another pilgrim do it for him after making sa'y. There is likewise nothing to prevent a pilgrim on hajj from doing the same after going to Mina from Muzdalifa.

And God Almighty knows best.