'Let Us' in the Bible

Then said the servants of the kings of Syria to him, "The gods of the hills are their gods, and therefore they had the better of us. But let us fight with them in the plain, and for what ye will, we shall have the better of them.

And do thou number thee a host, like the host that thou hast lost, and horse for horse and chariot for chariot, and let us fight with them in the plain; and for a wager, we get the better of them." And the king hearkened unto their voice and did even so.

Then said his servants unto him, "Behold, we have heard say that the kings of the house of Israel are merciful kings. Let us put sack cloth about our Loins and ropes about our heads, and go out to the king of Israel: haply he will save thy life."