'Gray headed' in the Bible

‘You shall rise up before the grayheaded and honor the aged, and you shall revere your God; I am the Lord.

From outside [her boundaries] the sword will make [her] childless, and from inside, terror; both [for] [the] young man [and] also the young woman, the infant [along with] the gray-headed man.

And now, behold, the king walketh before you: and I am old and grayheaded; and, behold, my sons are with you: and I have walked before you from my childhood unto this day.

Therefore he brought on them the king of the Chaldeans, who killed their young men with the sword in the house of their sanctuary, and had no compassion on young man or virgin, old man or gray-headed: he gave them all into his hand.

With us are both the grayheaded and very aged men, much elder than thy father.

Now also when I am old and grayheaded, O God, forsake me not; until I have shewed thy strength unto this generation, and thy power to every one that is to come.