New Revised Standard Version
They said, “This is blood; the kings must have fought together, and killed one another. Now then, Moab, to the spoil!”

Contemporary English Version
and shouted, "Look at that blood! The armies of those kings must have fought and killed each other. Come on, let's go take what's left in their camp."

New American Bible
and said, “This is blood! The kings have fought among themselves and killed one another. Quick! To the spoils, Moab!”

Douay-Rheims Bible
And they said: It is the blood of the sword: the kings have fought among themselves, and they have killed one another: go now, Moab, to the spoils.

And they said: It is the blood of the sword: the kings have fought among themselves, and they have killed one another: go now, Moab, to the spoils.

This is blood

2 Kings 6:18-20 And the enemies came down to him: but Eliseus prayed to the Lord, saying: Strike, I beseech thee, this people with blindness: and the Lord struck them with blindness, according to the word of Eliseus. . . .

2 Kings 7:6 For the Lord had made them hear, in the camp of Syria, the noise of chariots, and of horses, and of a very great army: and they said one to another: Behold, the king of Israel hath hired against us the kings of the Hethites, and of the Egyptians; and they are come upon us.

slain [heb] destroyed

Exodus 15:9 The enemy said: I will pursue and overtake, I will divide the spoils, my soul shall have its fill: I will draw my sword, my hand shall slay them.

Judges 5:30 Perhaps he is now dividing the spoils, and the fairest of the women is chosen out for him: garments of divers colours are given to Sisara for his prey, and furniture of different kinds is heaped together to adorn necks.

2 Chronicles 20:25 Then Josaphat came, and all the people with him to take away the spoils of the dead, and they found among the dead bodies, stuff of various kinds, and garments, and most precious vessels: and they took them for themselves, insomuch that they could not carry all, nor in three days take away the spoils, the booty was so great.

Isaiah 10:14 And my hand hath found the strength of the people as a nest; and as eggs are gathered, that are left, so have I gathered all the earth: and there was none that moved the wing, or opened the mouth, or made the least noise.