John Gill's Bible Commentary Ver. 6. So kill the passover , etc.] 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 Moses ; 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.
Matthew Henry Commentary
Verses 1-19 - The destruction Josiah made of idolatry, was more largely related in the book of Kings. His solemnizing the passover is related here. The Lord's supper resembles the passover more than any other of the Jewis festivals; and the due observance of that ordinance, is a proof of growing piety and devotion. God alone can truly make our hearts holy and prepare them for his holy services; but there are duties belongin to us, in doing which we obtain this blessing from the Lord.
Original Hebrew ושׁחטו7819 הפסח6453 והתקדשׁו6942 והכינו3559 לאחיכם251 לעשׂות6213 כדבר1697 יהוה3068 ביד3027 משׁה׃4872