'Gray' in the Bible

But Jacob replied, "My son will not go down there with you, for his brother is dead and he alone is left. If an accident happens to him on the journey you have to make, then you will bring down my gray hair in sorrow to the grave."

If you take this one from me too and an accident happens to him, then you will bring down my gray hair in tragedy to the grave.'

When he sees the boy is not with us, he will die, and your servants will bring down the gray hair of your servant our father in sorrow to the grave.