Exodus 27:2
And thou shalt make the horns of it upon the four corners thereof: his horns shall be of the same: and thou shalt overlay it with brass. And thou shalt make the horns of it upon the four corners thereof: his horns shall be of the same: and thou shalt overlay it with brass.
Exodus 27:2 belongs to the detailed specifications God gave to Moses for building the tabernacle. Within those instructions it provides for the altar of burnt offering, which stood in the outer court of the tabernacle. The skill and wisdom and ability exercised in carrying out that building work were gifts from God, entrusted to be employed for His glory.