'Pair' in the Bible

Of every clean animal you shall take with you seven pair, the male and his female, and of animals that are not clean, two each the male and his female;

A calyx shall be under the first pair of branches coming out of it, and a calyx under the second pair of branches coming out of it, and a calyx under the third pair of branches coming out of it, for the six branches coming out of the lampstand.

and a calyx was under the first pair of branches coming out of it, and a calyx under the second pair of branches, coming out of it, and a calyx under the third pair of branches coming out of it, for the six branches coming out of the lampstand.

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

Thus says the Lord,“For three transgressions of Israel and for four (multiplied delinquencies)I will not reverse its punishment or revoke My word concerning it,Because they sell the righteous and innocent for silverAnd the needy for the price of a pair of sandals.

So that we may buy the poor [as slaves] for silver [since they are unable to support themselves]And the needy for a pair of sandals,And that we may sell the leftovers of the wheat [as if it were a good grade of grain]?”