'Grown up' in the Bible

Then Judah said to Tamar his daughter-in-law, Remain a widow in thy father's house, till Shelah my son be grown up, for he said, Lest he also die, like his brothers. And Tamar went and dwelt in her father's house.

And she put the garments of her widowhood off from her, and covered herself with her veil, and wrapped herself, and sat in the gate of Enaim, which is by the way to Timnah, for she saw that Shelah was grown up, and she was not give