'One by one' in the Bible

In that time shall the LORD shoot from the swift water of Euphrates, unto the river of Egypt. And there shall the children be chosen out one by one.

And they began to mourn, and to say to him one by one, "Is it I?" And another said, "Is it I?"

And as soon as they heard that, they went out one by one, the eldest first. And Jesus was left alone, and the woman standing in the midst.

For ye may all prophesy one by one, that all may learn, and all may have comfort.