Origen
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.
Literally, hereby is signified the quickness of the Divine foresight, which reaches even to the least things. But mystically, the five sparrows justly represent the spiritual senses, which have perception of high and heavenly things: beholding God, hearing the Divine voice, tasting of the bread of life, smelling the perfume of Christ’s anointing, handling the Word of Life. And these being sold for two farthings, that is, being lightly esteemed by those who count as perishing whatever is of the Spirit, are not forgotten before God. But God is said to be forgetful of some because of their iniquities.