Genesis 45:4

And Joseph said unto his brethren, come near to me, I pray
you
Very probably Joseph sat in a chair of state while they were under examination, and through reverence of him they kept at a proper distance; or being frightened at what he had said, he might observe them drawing back, as Jarchi remarks, and so encourages them in a kind and tender manner to return and come nearer to him, and the rather, that they might more privately converse together without being overheard; as also that they might, by approaching him discern and call to mind some of his features still remaining, by which they might be assured he was Joseph indeed: and they came near, and he said, I [am] Joseph your brother;
not only his name was Joseph, but he was that Joseph that was their brother; he claims and owns the relation between them, which must be very affecting to them, who had used him so unkindly: whom ye sold into Egypt:
which is added, not so much to put them in mind of and upbraid them with their sin, but to assure them that he was really their brother Joseph; which he could not have related had he not been he, as well as to lead on to what he had further to say to them for their comfort.