21. God made coats of skins—taught them to make these for themselves. This implies the institution of animal sacrifice, which was undoubtedly of divine appointment, and instruction in the only acceptable mode of worship for sinful creatures, through faith in a Redeemer (Heb 9:22).

     4. the Lord had respect unto Abel, not unto Cain, &c.—The words, "had respect to," signify in Hebrew,—"to look at any thing with a keen earnest glance," which has been translated, "kindle into a fire," so that the divine approval of Abel's offering was shown in its being consumed by fire (see Ge 15:17; Jud 13:20).