Numbers 7:89

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.