Either,
1. At which door, for there the Lord stood and talked with Moses, Exodus 33:9,10. Or rather,
2. In which tabernacle, to wit, in the innermost part of it, because that was the principal place where God did ordinarily reside and meet with his people, Exodus 30:6 Leviticus 16:2; whereas God met but once at the door of the tabernacle, and that with Moses only, not with the people, with whom he is said to meet in this place, Exodus 29:43. Add to this, that the place where God meets them is the same place which is sanctified by his glory, and that was the tabernacle, Exodus 29:43, as it is expressed in our translation, and sufficiently implied in the Hebrew, by a common ellipsis of the pronoun it, i. e. that place where I meet with you, to wit, the tabernacle, shall be, &c.