Ambrose of Milan
Catena Aurea · Lukasevangelium 12
And I say unto you my friends, Be not afraid of them that kill the body, and after that have no more that they can do. But I will forewarn you whom ye shall fear: Fear him, which after he hath killed hath power to cast into hell; yea, I say unto you, Fear him. Are not five sparrows sold for two farthings, and not one of them is forgotten before God? But even the very hairs of your head are all numbered. Fear not therefore: ye are of more value than many sparrows.
If then such is the majesty of God, that a single sparrow or the number of our hair is not beside His knowledge, how unworthy is it to suppose that the Lord is either ignorant of the hearts of the faithful, or despises them so as to account them of less value. Hence He proceeds to conclude, Fear not then, ye are of more value than many sparrows.