Ambrose of Milan — as excerpted in the Catena Aurea on Luke 9:57-62

“The performance of a father’s burial is not then prohibited, but the observance of religious duty is preferred to the ties of relationship. The one is left to those in like condition, the other is commanded to those who are left. But how can the dead bury the dead? unless you here understand a twofold death, one a natural death, the other the death of sin. (Rom. 9:11.) There is also a third death, by which we die unto sin, live unto God.”