'Gray haired' in the Bible

The sword will make people childless outside, and terror will do so inside; they will destroy both the young man and the virgin, the infant and the gray-haired man.

"We have both the gray-haired and the aged with us, and they are far older than your father.

“Behind him he makes a wake to shine;One would think the deep to be gray-haired.

Yes, even when I am old and gray-haired, God, don't forsake me, until I have declared your strength to the next generation, your might to everyone who is to come.