At that time - i. e. in the first month, at the time of the events mentioned in 2 Chronicles 29.

For they could not keep it at the time,.... In the month Nisan, as the Targum adds, on the fourteenth day of the month, as the law enjoined, because the cleansing of the temple was not finished until the sixteenth day, see 2 Chronicles 29:17 and, besides this, two other reasons follow:

because the priests had not sanctified themselves sufficiently; that is, a sufficient number of them were not sanctified, to slay all the passover lambs the people that came to the feast would want:

neither had the people gathered themselves together to Jerusalem; they had no notice of it, nor summons for it; and it was required that, at such a time, all the males in the land should appear at Jerusalem; but this custom having been long disused, it required time to acquaint them of the revival of it.

For they could not keep it at that time, because the priests had not sanctified themselves sufficiently, neither had the people gathered themselves together to Jerusalem.

30:3 They kept - Not in the same manner as they had done the former, V.
3. Sufficiently - In such manner as was fit, nor in such numbers as but in the solemn worship of God, by sacrifices, and prayers, and praise, were necessary for the slaying and offering of so many thousands of and publick instruction of that great congregation in the good knowledge paschal - offerings, as appears, because they were not sufficient for of the Lord; which was most necessary for the people after so long and those offerings, which were comparatively few, chap.29:32,33,34. dismal a night of ignorance, superstition and idolatry.

30:1-12 Hezekiah made Israel as welcome to the passover, as any of his own subjects. Let us yield ourselves unto the Lord. Say not, you will do what you please, but resolve to do what he pleases. We perceive in the carnal mind a stiffness, an obstinacy, an unaptness to compel with God; we have it from our fathers: this must be overcome. Those who, through grace, have turned to God themselves, should do all they can to bring others to him. Numbers will be scorners, but some will be humbled and benefited; perhaps where least expected. The rich mercy of God is the great argument by which to enforce repentance; the vilest who submit and yield themselves to the Lord, seek his grace, and give themselves to his service, shall certainly be saved. Oh that messengers were sent forth to carry these glad tidings to every city and every village, through every land!