Rabanus Maurus, on Sir 47:2

“And as the fat taken away from the flesh, so was David chosen from among the children of Israel.”

“When it says that Nathan, like the fat of salvation, was separated from the meat, it indicates that he was full of the grace of the Holy Spirit and that his conduct and his life were far from and foreign to those of carnal and sinful people.”

Imported from an open dataset — not yet checked against the printed edition.