So kill the passover
In the manner, time, and place, and for the persons it should be killed:
and sanctify yourselves:
by washing themselves and garments, that they might be fit for this service:
and prepare your brethren;
prepare a lamb for your brethren, or instruct them how to perform their office that needed instruction:
that they may do according to the word of the Lord by the hand of
celebrate the ordinance of the passover in all its rites, according to the law of Moses, at least in every rite in which they were more peculiarly concerned.