This was the dedication of the altar, in the day, etc. - Meaning here the time in which it was dedicated; for as each tribe had a whole day for its representative or prince to present the offerings it had provided, consequently the dedication, in which each had his day, must have lasted twelve days: the words therefore, in this text, refer to the last day or twelfth, in which this dedication was completed.

two thousand J

1 Chronicles 22:14 Now, behold, in my trouble I have prepared for the house of the LORD an hundred thousand talents of gold...

1 Chronicles 29:4,7 Even three thousand talents of gold, of the gold of Ophir, and seven thousand talents of refined silver...

Ezra 8:25,26 And weighed to them the silver, and the gold, and the vessels, even the offering of the house of our God, which the king...

after the Shekel

Numbers 7:13 And his offering was one silver charger, the weight thereof was an hundred and thirty shekels, one silver bowl of seventy shekels...

Numbers
Like the last part of Exodus, and the whole of Leviticus, the first part of Numbers, i.-x. 28--so called,[1] rather inappropriately, from the census in i., iii., (iv.), xxvi.--is unmistakably priestly in its interests and language. Beginning with a census of the men of war (i.) and the order of the camp (ii.), it devotes specific attention to the Levites, their numbers and duties (iii., iv.). Then follow laws for the exclusion of the unclean, v. 1-4, for determining the manner and amount of restitution …
John Edgar McFadyen—Introduction to the Old Testament