Adam Clarke on Numbers 16:5

The Lord will show who are his - It is supposed that St. Paul refers to this place, 2Tim 2:19 : The foundation of God - the whole sacrificial system, referring to Christ Jesus, the foundation of the salvation of men; standeth sure, notwithstanding the rebellions, intrusions, and false doctrines of men; having this seal - this stamp of its Divine authenticity, The Lord knoweth them that are his; εγνω Κυριος τους οντας αυτου, a literal translation of וידע יהוה את אשר לו veyoda Yehovah eth asher lo; and both signifying, The Lord approveth of his own; or, will own that which is of his own appointment. And let every one that nameth the name of Christ depart from iniquity, alluding to the exhortation of Moses, Num 16:26 : Depart, I pray you, from the tents of these wicked men.