Augustine of Hippo — as excerpted in the Catena Aurea on Luke 15:17-24

“(de Quæst. Evan. l. ii. qu. 33.) But whether was this sin against heaven, the same as that which is before thee; so that he described by the name of heaven his father’s supremacy. I have sinned against heaven, i. e. before the souls of the saints; but before thee in the very sanctuary of my conscience.”