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.
Since unbelief springs from two causes, either from a deeply-seated malice or a sudden fear; lest any one from terror should be compelled to deny the God whom he acknowledges in his heart, He well adds, And I say unto you my friends, Be not afraid of them that kill the body, &c.