Then Josiah contributed to the lay people, as Passover offerings for all who were present, lambs and young goats from the flock to the number of 30,000, and 3,000 bulls; these were from the king’s possessions.
The destruction which Josiah made of idols and idolatry was more largely related in the Kings, but just mentioned here in the foregoing chapter (v. 33); but his solemnizing the passover, which was touched upon there (Kg2 23:21), is very particularly related here. Many were the feasts of the Lord, appointed by the ceremonial law, but the passover was the chief.
Commenting on 2 Chronicles 35:1-19
And Josiah gave to the people, of the flock, lambs and kids, all for the passover offerings,.... Which be either lambs or kids of the goats, Exo 12:5, for all that were present, to the number of 30,000; that is, 30,000 lambs or kids, which would serve 30,000 families: and three thousand bullocks; these were for the "chagigah" or feast, kept on the day following...
Josiah gave to the people . . . lambs and kids--These were in all probability destined for the poor; a lamb or a kid might be used at convenience (Exo 12:5). and . . . bullocks--which were offered after the lambs on each of the successive days of the feast.