'Thousands' in the Bible

If only one of them is sounded, then the chiefs, the heads of the thousands of Israel, are to come to you.

Who is able to take the measure of the dust of Jacob or the number of the thousands of Israel? May my death be the death of the upright and my last end like his!

So from the thousands of Israel a thousand were taken from every tribe, twelve thousand men armed for war.

And Moses was angry with the chiefs of the army, the captains of thousands and the captains of hundreds who had come back from the war.

Then the men in authority over the thousands of the army, the captains of thousands and captains of hundreds, came to Moses,

And the gold which the captains of thousands and captains of hundreds gave, as an offering to be lifted up before the Lord, came to sixteen thousand, seven hundred and fifty shekels.

Then Moses and Eleazar the priest took the gold given by the captains of thousands and captains of hundreds, and took it into the Tent of meeting, to be a sign in memory of the children of Israel before the Lord.