The Prophet (may Allah's peace and blessings be upon him) preferred beginning with the right side when wearing his sandals, combing his hair, purifying himself, and in all of his affairs

The Prophet (may Allah's peace and blessings be upon him) would like and prefer to begin with the right side in all matters worthy of honor. This includes the following: He would begin with the right foot in putting on his sandals, and begin with the right side in grooming, combing, and oiling his hair and beard; and in his ablution, he would start with the right side in washing his hands and feet.