'Grown up' in the Bible
Then Judah said to Tamar, his daughter-in-law, "Remain a widow in your father's house, until Shelah, my son, is grown up;" for he said, "Lest he also die, like his brothers." Tamar went and lived in her father's house.
She took off of her the garments of her widowhood, 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 wasn't given to him as a wife.
It happened in those days, when Moses had grown up, that he went out to his brothers, and looked at their burdens. He saw an Egyptian striking a Hebrew, one of his brothers.
But the wheat and the spelt were not struck, for they had not grown up.
But he forsook the counsel of the old men which they had given him, and took counsel with the young men who had grown up with him, who stood before him.
The young men who had grown up with him spoke to him, saying, "Thus you shall tell this people who spoke to you, saying, 'Your father made our yoke heavy, but make it lighter to us;' you shall say to them, 'My little finger is thicker than my father's waist.
Therefore their inhabitants were of small power. They were dismayed and confounded. They were like the grass of the field, and like the green herb, like the grass on the housetops, and like grain blasted before it has grown up.
But he forsook the counsel of the old men which they had given him, and took counsel with the young men who had grown up with him, who stood before him.
The young men who had grown up with him spoke to him, saying, "Thus you shall tell the people who spoke to you, saying, 'Your father made our yoke heavy, but make it lighter on us;' thus you shall say to them, 'My little finger is thicker than my father's waist.
and I said, "My God, I am ashamed and blush to lift up my face to you, my God; for our iniquities have increased over our head, and our guiltiness has grown up to the heavens.
By faith, Moses, when he had grown up, refused to be called the son of Pharaoh's daughter,