In Targum Pseudo-Jonathan on (Genesis 4:4), Abel's offering is described in three careful words: "the firstlings of the flock, and of their fat."

The firstlings — the first-born of his animals. The fat — the richest, choicest portions. Abel gave the best he had. Every word of the description is a contrast with his brother's token gesture. And the Lord responded: "It was pleasing before the Lord, and He gave His countenance to Habel and to his oblation."

God's face turned toward Abel. That phrase — "gave His countenance" — is the Targumist's rendering of divine favor. Abel experienced what Aaron would later bless Israel with: "May the Lord lift His countenance upon you" (Numbers 6:26). It is the same image. A gift given from the heart is met with a face given in return.