'One by one' in the Bible

They began to be sorrowful, and to say to him one by one, "Is it I?"

Then those who heard it went away one by one, beginning with the oldest even to the last, and Jesus was left alone, with the woman standing before him.

After he had greeted them, he related one by one the things that God had done among the Gentiles through his ministry.

For you can all prophesy one by one, so that all may learn and all be encouraged;