do not harden your hearts as you did at Meribah, in the day at Massah in the wilderness, where your fathers tested and tried Me, though they had seen My work. For forty years I was angry with that generation, and I said, "They are a people whose hearts go astray, and they have not known My ways." So I swore on oath in My anger, "They shall never enter My rest."
The time we spent traveling from Kadesh-barnea until we crossed over the Brook of Zered was thirty-eight years, until that entire generation of fighting men had perished from the camp, as the LORD had sworn to them. Indeed, the LORD's hand was against them, to eliminate them from the camp, until they had all perished.
Significance
Psalm 95:10 recalls "For forty years I was angry with that generation" — referencing the wilderness wandering period. Deuteronomy 2:14-15 provides the historical specifics: "The time we spent traveling from Kadesh-barnea until we crossed over the Brook of Zered was thirty-eight years, until that entire generation of fighting men had perished from the camp, as the LORD had sworn to them." The psalm's "forty years" (אַרְבָּעִים שָׁנָה, arba'im shanah) of divine displeasure corresponds to the historical period Deuteronomy chronicles — the systematic dying off of the unfaithful generation. The psalm transforms this historical record into a liturgical exhortation, warning the present generation not to repeat the rebellion that consumed their ancestors in the wilderness. The oath itself is more specific still: "So I swore on oath in My anger, 'They shall never enter My rest (מְנוּחָתִי, menuchati)'" (95:11), grounding the wilderness generation's exclusion in a formal divine oath (נִשְׁבַּעְתִּי, nishba'ti) rather than mere historical report.