Numbers 27:14

"...for when the community rebelled at the waters in the Desert of Zin, both of you disobeyed my command to honor me as holy before their eyes.” (These were the waters of Meribah Kadesh, in the Desert of Zin.)

It is a serious thing not to honour God and not to obey his commands.

Numbers 25:10-13

The Lord said to Moses, “Phinehas son of Eleazar, the son of Aaron, the priest, has turned my anger away from the Israelites. Since he was as zealous for my honor among them as I am, I did not put an end to them in my zeal. Therefore tell him I am making my covenant of peace with him. He and his descendants will have a covenant of a lasting priesthood, because he was zealous for the honor of his God and made atonement for the Israelites.”

It pleases The Lord to be zealous for his honour.

Numbers 22:38

“Well, I have come to you now,” Balaam replied. “But I can’t say whatever I please. I must speak only what God puts in my mouth.”

I should only say and do what the Lord allows me to do.

Numbers 18:8-11

Those who serve the Lord will be blessed by the Lord. He will not forget the service we render to him. The rewards will be for his servant and his/her family members.

Numbers 14:11

After all the Lord has done to me and for me, i must not and should not disbelieve him nor treat him with contempt!

Numbers 11:4-6, 20

When longing about things in our lives (before we knew Christ) which i have given up, i can be considered to be rejecting God.

The old has gone, the new is here. Leave the old in the past.

2 Chronicles 30:18-20

¹⁸ Although most of the many people who came from Ephraim, Manasseh, Issachar and Zebulun had not purified themselves, yet they ate the Passover, contrary to what was written. But Hezekiah prayed for them, saying, “May the Lord, who is good, pardon everyone ¹⁹ who sets their heart on seeking God—the Lord, the God of their ancestors—even if they are not clean according to the rules of the sanctuary.” ²⁰ And the Lord heard Hezekiah and healed the people. 

God looks at the hearts - even if the people are not clean according to the rules, God's favour is on those who's heart seeks for him.