Psalm 102

Its title says it's for anyone afflicted who "grows faint and pours out his lament." There's insomnia, forgetting to eat, being like a lone bird on a roof, ashes for bread. Then it turns to God, who sits forever, hears a prisoner's groaning, and remains when the heavens wear out like clothing. Hebrews 1:10-12 applies verses 25-27 to the Son.

"But You remain the same, and Your years will never end." (Psalm 102:27)