Do not harden your hearts as in rebellion.

“Therefore, holy brethren, partakers of the heavenly calling, consider the Apostle and High Priest of our confession, Christ Jesus, who was faithful to Him who appointed Him, as Moses also was faithful in all His house. For this One has been counted worthy of more glory than Moses, inasmuch as He who built the house has more honor than the house. For every house is built by someone, but He who built all things is God. And Moses indeed was faithful in all His house as a servant, for a testimony of those things which would be spoken afterward, but Christ as a Son over His own house, whose house we are if we hold fast the confidence and the rejoicing of the hope firm to the end. Therefore, as the Holy Spirit says: “Today, if you will hear His voice, Do not harden your hearts as in the rebellion, In the day of trial in the wilderness, Where your fathers tested Me, tried Me, And saw My works forty years. Therefore I was angry with that generation, And said, ‘They always go astray in their heart, And they have not known My ways.’ So I swore in My wrath, ‘They shall not enter My rest.’ ” Beware, brethren, lest there be in any of you an evil heart of unbelief in departing from the living God; but exhort one another daily, while it is called “Today,” lest any of you be hardened through the deceitfulness of sin. For we have become partakers of Christ if we hold the beginning of our confidence steadfast to the end, while it is said: “Today, if you will hear His voice, Do not harden your hearts as in the rebellion.””
‭‭Hebrews‬ ‭3‬:‭1‬-‭15‬ ‭NKJV‬‬