In process of time — At the end of days, either at the end of the year when they kept their feast of in — gathering, or at the end of the days of the week, the seventh day; at some set time Cain and Abel brought to Adam, as the priest of the family, each of them an offering to the Lord; for which we have reason to think there was a divine appointment given to Adam, as a token of God's favour notwithstanding their apostacy.
Related Commentaries of Genesis 4:3
Genesis 4:3
3 And in processc of time it came to pass, that Cain brought of the fruit of the ground an offering unto the LORD.