Charles Ellicott Commentary Isaiah 46:4

"and even to old age I am he, and even to hoar hairs will I carry [you]; I have made, and I will bear; yea, I will carry, and will deliver." — Isaiah 46:4 (ASV)

Even to your old age. —The care of a mother ceases, in the natural course of things, before a man grows old, but the fatherly, we might almost say the mother-like, maternal care of Jehovah for His chosen ones endures even to the end of life.