'One by one' in the Bible

And they were grieved, and said to Him one by one, Is it I?

But when they heard his answer, being convicted by their own conscience, they went out one by one, beginning at the elder, even to the last. And Jesus was left alone, and the woman standing in the midst of the people.

For ye may all prophesy one by one, that all may learn, and all may be comforted.