The book of Numbers records the account of the Children of Israel and the 40 years they spent in the wilderness. Our summary verse is Numbers 23:19: “God is not a man, that He should lie, Nor a son of man, that He should repent. Has He said, and will He not do? Or has He spoken, and will He not make it good?” (NKJV). This book reminds us of the faithfulness of God as He provided for, led and protected His people during all these years even though they were not faithful. 

source https://burdenblessing.podbean.com/e/5-numbers-summary-verse/