Noah Webster's Dictionary (p. pr. & vb. n.) of Ripen.

Multi-Version Concordance Ripening (1 Occurrence) Isaiah 18:5 For before the harvest, when the blossom is over, and the flower becomes a ripening grape, he will cut off the sprigs with pruning hooks, and he will cut down and take away the spreading branches. (WEB KJV JPS ASV DBY WBS NAS RSV NIV)