Let your conversation be without covetousness; and be content with such things as ye have: for He hath said, I will never leave thee, nor forsake thee. – Hebrews 13:5

It seems from our text that “He hath said” is not only useful to chase away doubts, fears, difficulties, and devils, but that it also yieldeth nourishment to all our graces. You perceive that when the apostle would make us contented, he says, “Be content with such things as ye have, for He hath said;” and when he would make us bold and courageous, he puts it, “He hath said, therefore, we may boldly say, God is my helper, I will not fear what man can do unto me.” When the apostle would nourish faith, he does it by quoting from Scripture the examples of Abraham, of Isaac, of Jacob, of Moses, of Gideon, of Barak, and of Jephthah. When he would nourish our patience, he says, “Ye remember the patience of Job;” or if it be our prayerfulness, he says, “Elias was a man of like passions with us, and he prayed and prevailed.” “He hath said” is food for every grace as well as death for every sin. Here you have nourishment for that which is good, and poison for that which is evil. Search ye, then, the Scriptures, for so shall ye grow healthy, strong, and vigorous in the divine life.

“The soul that on Jesus hath lean’d for repose,
I will not, I will not desert to his foes;
That soul, though all hell should endeavor to shake,
I’ll never, no never, no never forsake.”

~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0477.cfm