Hebrews 5 [11.] About him we have many words to say, and hard to interpret, seeing you have become dull of hearing. For although by this time you should be teachers, you again need to have someone teach you the rudiments of the first principles of the revelations of God. You have come to need milk, and not solid food. For everyone who lives on milk is not experienced in the word of righteousness, for he is a baby. But solid food is for those who are full grown, who by reason of use have their senses exercised to discern good and evil.
Hebrews 6 [1.] Therefore leaving the teaching of the first principles of Christ, let us press on to perfection—not laying again a foundation of repentance from dead works, of faith toward God, of the teaching of baptisms, of laying on of hands, of resurrection of the dead, and of eternal judgment. This will we do, if God permits. For concerning those who were once enlightened and tasted of the heavenly gift, and were made partakers of the Holy Spirit, and tasted the good word of God, and the powers of the age to come, and then fell away, it is impossible to renew them again to repentance; seeing they crucify the Son of God for themselves again, and put him to open shame.
Hebrews 6 [7.] For the land which has drunk the rain that comes often on it, and produces a crop suitable for them for whose sake it is also tilled, receives blessing from God; but if it bears thorns and thistles, it is rejected and near being cursed, whose end is to be burned.
Hebrews 6 [9.] But, beloved, we are persuaded of better things for you, and things that accompany salvation, even though we speak like this. For God is not unrighteous, so as to forget your work and the labor of love which you showed toward his name, in that you served the saints, and still do serve them. We desire that each one of you may show the same diligence to the fullness of hope even to the end, that you won’t be sluggish, but imitators of those who through faith and patience inherited the promises. For when God made a promise to Abraham, since he could swear by no one greater, he swore by himself, saying, “Surely blessing I will bless you, and multiplying I will multiply you.”[a]
a. Hebrews 6:14 Genesis 22:17