Exodus 17:7

17:7 He called the name of the place Massah and Meribah, because of the contending of the Israelites and because of their testing the Lord, ¹  saying, “Is the Lord among us or not?”

Deuteronomy 32:51

32:51 for both of you ²  rebelled against me among the Israelites at the waters of Meribah Kadesh in the desert of Zin when you did not show me proper respect ³  among the Israelites.

[17:7]  ¹ sn The name Massah (מַסָּה, massah) means “Proving”; it is derived from the verb “test, prove, try.” And the name Meribah (מְרִיבָה, mÿrivah) means “Strife”; it is related to the verb “to strive, quarrel, contend.” The choice of these names for the place would serve to remind Israel for all time of this failure with God. God wanted this and all subsequent generations to know how unbelief challenges God. And yet, he gave them water. So in spite of their failure, he remained faithful to his promises. The incident became proverbial, for it is the warning in Ps 95:7-8, which is quoted in Heb 3:15: “Oh, that today you would listen as he speaks! Do not harden your hearts as in the rebellion, in the day of testing in the wilderness. There your fathers tested me and tried me, and they saw my works for forty years.” The lesson is clear enough: to persist in this kind of unbelief could only result in the loss of divine blessing. Or, to put it another way, if they refused to believe in the power of God, they would wander powerless in the wilderness. They had every reason to believe, but they did not. (Note that this does not mean they are unbelievers, only that they would not take God at his word.)

[32:51]  ² tn The use of the plural (“you”) in the Hebrew text suggests that Moses and Aaron are both in view here, since both had rebelled at some time or other, if not at Meribah Kadesh then elsewhere (cf. Num 20:24; 27:14).

[32:51]  ³ tn Heb “did not esteem me holy.” Cf. NIV “did not uphold my holiness”; NLT “failed to demonstrate my holiness.”