'Let Us' in the Bible

And David said unto all the congregation of Israel, If it seems good unto you, and that it is of the LORD our God, let us send out unto our brethren everywhere, that are left in all the land of Israel, and with them also to the priests and Levites who are in their cities and pasture lands, that they may gather themselves unto us:

And let us bring again the ark of our God to us: for we have not inquired at it in the days of Saul.

Be of good courage, and let us fight valiantly for our people, and for the cities of our God: and let the LORD do that which is good in his sight.