'Gray headed' in the Bible

And now, behold, the king going before you: and I grew old and I was gray-headed; and my sons, behold them with you: and I went before you from my youth even to this day.

And he will bring against them the king of the Chaldeans, and he will kill their chosen with the sword in the house of the holy place, and he pitied not over young man and virgin, old man and the gray-headed: he gave all into his hand.

Also the gray headed and old man with us, great of days above thy fathers.