Matthew Henry Commentary Numbers 15:30-36

"But the soul that doeth aught with a high hand, whether he be home-born or a sojourner, the same blasphemeth Jehovah; and that soul shall be cut off from among his people. Because he hath despised the word of Jehovah, and hath broken his commandment, that soul shall utterly be cut off; his iniquity shall be upon him. And while the children of Israel were in the wilderness, they found a man gathering sticks upon the sabbath day. And they that found him gathering sticks brought him unto Moses and Aaron, and unto all the congregation. And they put him in ward, because it had not been declared what should be done to him. And Jehovah said unto Moses, The man shall surely be put to death: all the congregation shall stone him with stones without the camp. And all the congregation brought him without the camp, and stoned him to death with stones; as Jehovah commanded Moses." — Numbers 15:30-36 (ASV)

Those are to be considered presumptuous sinners who sin intentionally against God's will and glory. Sins committed in this way are extremely sinful. The one who thus breaks the commandment reproaches the Lord. He also despises the word of the Lord. Presumptuous sinners despise it, thinking themselves too great, too good, and too wise to be ruled by it.

A particular instance of presumption in the sin of Sabbath-breaking is related. The offense was gathering sticks on the Sabbath day to make a fire, whereas the people were to bake and seethe what they needed the day before (Exodus 16:23). This was done as an affront both to the law and to the Lawgiver. God is jealous for the honor of His Sabbaths and will not hold guiltless anyone who profanes them, whatever people may do. God intended this punishment as a warning to all, to be conscientious about keeping the Sabbath holy.

And we may be assured that no command was ever given for the punishment of sin which, at the Judgment Day, will not prove to have come from perfect love and justice. The right of God to a day of devotion to Himself will be disputed and denied only by those who listen to the pride and unbelief of their hearts, rather than to the teaching of the Spirit of truth and life. What is the difference between the one who was detected gathering sticks in the wilderness on God's day, and the man who turns his back upon the blessings of Sabbath appointments and the promises of Sabbath mercies, to use his time, his concerns, and his soul in heaping up riches, and to waste his hours, his property, and his strength in sinful pleasure?

Wealth may come by the unhallowed effort, but it will not come alone; it will have its awful reward. Sinful pursuits lead to ruin.