That sprang up and increased (ἀναβαίνοντα καὶ αὐξανόμενον)
The Rev. literally renders the participles, growing up and increasing, thus describing the process more vividly. These two participles, moreover, explain the use of the imperfect tense ἐδίδου (yielded), denoting continuance. It began to yield and kept yielding as it increased.