"And a man found him" (Genesis 37:15). Three kings were joined to him. "And a man found him" — that is one. "And the man asked him" — that is two. "And the man said" — that is three. "And a man found him" — this is Gabriel, as it is said, "the man Gabriel" (Daniel 9:21).
The Angel Gabriel Finds Joseph Wandering in the Field
Midrash Aggadah, Genesis 37:15
וימצאהו איש. שלשה מלכים נזדווגו לו. וימצאהו איש, הרי א', וישאלהו [האיש], הרי ב', ויאמר האיש הרי ג': וימצאהו איש. זה גבריאל שנאמר והאיש גבריאל (דניאל ט כא):