'Let Us' in the Bible

Be strong, and let us strengthen ourselves for the sake of the people and for the sake of the cities of our God. May Yahweh do [what is] good in his eyes.

Then David said to all his servants who [were] with him in Jerusalem, "Get up and let us flee, for there will be no escape for us from Absalom! Hurry to go, otherwise he will come quickly and overtake us! And he will bring disaster on us and evil! He will attack the city with the edge of the sword!"

Then Absalom said, "Please call also for Hushai the Arkite, and let us hear {what he has to say} also."

Then David said to Gad, "I [am] greatly distressed. Please let us fall into the hand of Yahweh, because he [is] great in his compassion; but into the hand of man don't let me fall."