Patristic
“But when He says, The God of Abraham, the God of Isaac, and the God of Jacob; by naming God thrice, He implied the Trinity. But when He says, He is not the God of the dead, by naming again the One God, he implies One Substance. But they live who make good the portion, which they had chosen; and they are dead, who have lost what they had made good. Ye therefore do greatly err.”
Catena Aurea: Gospel of Mark, as excerpted in the Catena Aurea on Mark 12:18-27
PD · J. H. Newman (Oxford, 1842) ↗