'Pair' in the Bible

So Samson went and caught three hundred foxes, and took torches; and he turned them tail to tail, and put a torch between each pair of tails.

Thus saith Jehovah: For three transgressions of Israel, and for four, I will not revoke its sentence; because they have sold the righteous for silver, and the needy for a pair of shoes;

that we may buy the poor for silver, and the needy for a pair of shoes; and that we may sell the refuse of the wheat.

and to offer a sacrifice according to what is said in the law of the Lord: A pair of turtle doves, or two young pigeons.