16 And they took their places in their right order, as it was ordered in the law of Moses, the man of God: the priests draining out on the altar the blood given them by the Levites. 17 For there were still a number of the people there who had not made themselves holy: so the Levites had to put Passover lambs to death for those who were not clean, to make them holy to the Lord. 18 For a great number of the people from Ephraim and Manasseh, Issachar and Zebulun, had not made themselves clean, but they took the Passover meal, though not in the right way. For Hezekiah had made prayer for them, saying, May the good Lord have mercy on everyone
Matthew Henry's Commentary on 2 Chronicles 30:16-18
Commentary on 2 Chronicles 30:13-20
(Read 2 Chronicles 30:13-20)
The great thing needful in attendance upon God in solemn ordinances, is, that we make heart-work of it; all is nothing without this. Where this sincerity and fixedness of heart are, there may yet be many things short of the purification of the sanctuary. These defects need pardoning, healing grace; for omissions in duty are sins, as well as omissions of duty. If God should deal with us in strict justice, even as to the very best of our doings, we should be undone. The way to obtain pardon, is to seek it of God by prayer; it must be gotten by petition through the blood of Christ. Yet every defect is sin, and needs forgiveness; and should be matter to humble, but not to discourage us, though nothing can make up for the want of a heart prepared to seek the Lord.