They envied Moses - A reference to the case of Korah and his company.

Aaron the saint - The anointed, the high priest of the Lord.

Exodus 32:4-8,35 And he received them at their hand, and fashioned it with a engraving tool, after he had made it a molten calf: and they said...

Deuteronomy 9:12-16,21 And the LORD said to me, Arise, get you down quickly from hence...

Nehemiah 9:18 Yes, when they had made them a molten calf, and said, This is your God that brought you up out of Egypt...

1 Corinthians 10:7 Neither be you idolaters, as were some of them; as it is written, The people sat down to eat and drink, and rose up to play.

Sin: Its Spring-Head, Stream, and Sea
It may help us to escape out of the meshes of our natural depravity, if we look back and see the causes of our fathers' sins. To confess our personal sin will tend to keep us humble; and in view of the Lord's mercy, which has spared and pardoned us, a sense of our guilt will make us grateful. The less we think of ourselves the more we shall think of him whose "mercy endureth for ever"; and if we see where our fathers' sins began, and how they grew, and what they came to, we may hope that the Spirit …
Charles Haddon Spurgeon—Spurgeon's Sermons Volume 37: 1891

Rest for the Weary
Come unto me, all ye that labour and are heavy laden, and I will give you rest. W hich shall we admire most -- the majesty, or the grace, conspicuous in this invitation? How soon would the greatest earthly monarch be impoverished, and his treasures utterly exhausted, if all, that are poor and miserable, had encouragement to apply freely to him, with a promise of relief, fully answerable to their wants and wishes! But the riches of Christ are unsearchable and inexhaustible. If millions and millions …
John Newton—Messiah Vol. 1

The Second Commandment
Thou shalt not make unto thee any graven image, or any likeness of any thing that is in heaven above, or that is in the earth beneath, or that is in the water under the earth: thou shalt not bow down thyself to them, nor serve them: for I the Lord thy God am o jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of then that hate me; and shewing mercy unto thousands of them that love me and keep my commandments.' Exod 20: 4-6. I. Thou shalt not …
Thomas Watson—The Ten Commandments