Into the tabernacle of the congregation; into which Moses, though no priest, was permitted to enter by God's special license. To speak with him, i.e. to consult God upon occasion. From off the mercy-seat, which Moses standing without the veil could easily hear. And this seems to be added in this place, to show that when men had done their part in the dedication of the tabernacle, altars, &c., God was not wanting in the performance of his part, and promise made, Exodus 25:22.
Related Commentaries of Numbers 7:89
Numbers 7:89
89 And when Moses was gone into the tabernacle of the congregation to speak with him, then he hearda the voice of one speaking unto him from off the mercy seat that was upon the ark of testimony, from between the two cherubims: and he spake unto him.