John Gills Exposition of the Bible Commentary - Exodus 25:21
And thou shalt put the mercy seat above upon the ark ,.... Over it, as a covering for it: this situation of the mercy seat above the ark, where the law was, signifies, that there is no mercy but in a way of righteousness, or of satisfaction to the law of God, and in a consistence with the honour of it; and the cherubim over the mercy seat making a throne for the majesty of God, in which he sat, and the ark below a kind of footstool for him, shows that Christ, the mercy seat and propitiatory,... read more
Matthew Henry's Complete Commentary - Exodus 25:10-22
The first thing which is here ordered to be made is the ark with its appurtenances, the furniture of the most holy place, and the special token of God's presence, for which the tabernacle was erected to be the receptacle. I. The ark itself was a chest, or coffer, in which the two tables of the law, written with the finger of God, were to be honourably deposited, and carefully kept. The dimensions of it are exactly ordered; if the Jewish cubit was, as some learned men compute, three inches... read more