'Two' in the Bible

The words of Amos, who was among the sheepherders from Tekoa, which he envisioned in visions concerning Israel in the days of Uzziah king of Judah, and in the days of Jeroboam son of Joash, king of Israel, two years before the earthquake.

Do two men walk together unless they have made an appointment?

“So two or three cities would stagger to another city to drink water,But would not be satisfied;Yet you have not returned to Me,” declares the Lord.