'Let Us' in the Bible

So he said to Judah, “Let us build these cities and surround them with walls, towers, gates and bars [to secure the doors]. The land is still ours because we have sought the Lord our God; we have sought Him [longing for Him with all our heart] and He has given us peace on every side.” So they built and prospered.

Then Amaziah king of Judah took counsel and sent word to Joash the son of Jehoahaz the son of Jehu, king of Israel, saying, “Come [to battle], let us face each other.”