2 Samuel 19:14
"And he bowed the heart of all the men of Judah, even as the heart of one man; so that they sent this word unto the king, Return thou, and all thy servants."
Cross References (ranked by relevance)
Judges 20:1
Then all the children of Israel went out, and the congregation was gathered together as one man, from Dan even to Beersheba, with the land of Gilead, unto the LORD in Mizpeh.
Acts 4:32
And the multitude of them that believed were of one heart and of one soul: neither said any of them that ought of the things which he possessed was his own; but they had all things common.