This was the {f} dedication of the altar, in the day when it was anointed, by the princes of Israel: twelve chargers of silver, twelve silver bowls, twelve spoons of gold:

(f) This was the offering of the princes, when Aaron dedicated the altar.

Jamieson-Fausset-Brown Bible Commentary

84-88. This was the dedication of the altar-The inspired historian here sums up the separate items detailed in the preceding narrative, and the aggregate amount is as follows: 12 silver chargers, each weighing 130 shekels equals 1560; 12 silver bowls, each 70 shekels equals 840: total weight. A silver charger at 130 shekels, reduced to troy weight, made 75 ounces, 9 pennyweights, 168.31 grains; and a silver bowl at 70 shekels amounts to 40 ounces, 12 pennyweights, 2121.31 grains. The total weight of the 12 chargers is therefore 905 ounces, 16 pennyweights, 33.11 grains; and that of the 12 bowls 487 ounces, 14 pennyweights, 204.31 grains; making the total weight of silver vessels 1393 ounces, 10 pennyweights, 237.31 grains; which at 5s. per ounce, is equal to £383 1s. 8½d. The 12 golden spoons, allowing each to be 5 ounces, 16 pennyweights, 3.31 grains, amount to 69 ounces, 3 pennyweights, 135.31 grains, which, at £4 per ounce, is equal to £320 14s. 10½d., and added to the amount of the silver, makes a total of £703 16s. 6½d. Besides these the offerings comprised twelve bullocks, twelve rams, twelve lambs, twenty-four goats, sixty rams, sixty he-goats, sixty lambs-amounting in all to 240. So large a collection of cattle offered for sacrifice on one occasion proves both the large flocks of the Israelites and the abundance of pastures which were then, and still are, found in the valleys that lie between the Sinaitic Mountains. All travellers attest the luxuriant verdure of those extensive wadies; and that they were equally or still more rich in pasture anciently, is confirmed by the numerous flocks of the Amalekites, as well as of Nabal, which were fed in the wilderness of Paran (1Sa 15:9).

Matthew Henry's Concise Commentary

7:10-89 The princes and great men were most forward in the service of God. Here is an example to those in authority, and of the highest rank; they ought to use their honour and power, their estate and interest, to promote religion and the service of God in the places where they live. Though it was a time of joy and rejoicing, yet still, in the midst of their sacrifices, we find a sin-offering. As, in our best services, we are conscious that there is sin, there should be repentance, even in our most joyful services. In all approaches to God we must by faith look to Christ as the Sin-offering. They brought their offerings each on a day. God's work should not be done confusedly, or in a hurry; take time, and we shall have done the sooner, or, at least, we shall have done the better. If services are to be done for twelve days together, we must not call it a task and a burden. All their offerings were the same; all the tribes of Israel had an equal share in the altar, and an equal interest in the sacrifices offered upon it. He who now spake to Moses, as the Shechinah or Divine Majesty, from between the Cherubim, was the Eternal Word, the second Person in the Trinity; for all God's communion with man is by his Son, by whom he made the world, and rules the church, who is the same yesterday, to-day, and for ever.