Matthew Poole and continuators on Hebrews 3:8

8 Harden not your hearts, as in the provocation , in the day of temptation in the wilderness :

To help in the former Duty the Spirit subjoins this negative Counsel, that is stiled hard, which will not yield to any Impression: Make not your Heart a Stone, so as not to understand, believe, or obey God's Voice to it, Deut. 15.7. and 1 Sam. 6.6. For God requires them to be his Fleshy Tables, to write his Will on, 2 Cor. 3.3. The hardening of this part is the hardening of the whole person, and when hardned by themselves, is provoking God's judicial hardning of them to their Destruction.

[non-Latin text not transcribed]. In the bitter contention, comprehending in it both Work, Season and Place. Called Meribah, Numb. 20.13, 14. Names of Places and Persons by Words of the same signification, though not of the same sound.

In the day of Massah, when Israel in the Wilderness did murmur, and strive against, and vexed God (after he had divided the Sea for them) for their want of Water, Exod. 17.2, 7. Deut. 6.16. and 33.8. That bitter Contest of unbelief after the sight of so many Miracles when they cried out, Is the Lord among us? Psal. 95.8. It may also refer to the whole Forty Years time of their Murmuring and Tempting him in the Wilderness.