Jerome

Reuben, my firstborn, you are my strength and the first of my sons, tough in bearing and tough in insolence and injury, like water that does not boil. You went up on your father's bed, then you defiled it when you went up. In Hebrew it is written: Reuben, my firstborn, you are my strength, and the first in power among my sons. Greater in carrying, and greater in strength. You are poured out like water, do not exceed. For you have ascended the bed of your father and defiled the couch in his ascent. …

Hebrew Questions on Genesis ↗

Hippolytus of Rome

For there was a great display of strength made by God in behalf of His first-born people from Egypt. For in very many ways was the land of the Egyptians chastised. That first people of the circumcision is meant by "my strength, and the first of my children: "even as God gave the promise to Abraham and to his seed. But "hard to bear with," because the people hardened itself against the obedience of God. And "hard, self-willed," because it was not only hard against the obedience of God, but also self-willed so as to set upon the Lord. …

Hippolytus Exegetical Fragments ↗