Massah
Massah is the name given to a place in the wilderness where Israel, in their thirst, strove with Moses and tested Yahweh. The name is paired with Meribah and recurs through the rest of the Pentateuch and into the Psalter as the standing memorial of that testing.
The Naming at Rephidim
Israel encamped at Rephidim after journeying from the wilderness of Sin, "and there was no water for the people to drink" (Exodus 17:1). The people quarreled with Moses for water, and Moses answered them, "Why do you⁺ strive with me? Why do you⁺ try Yahweh?" (Exodus 17:2). As thirst sharpened, "the people murmured against Moses, and said, Why have you brought us up out of Egypt, to kill us and our sons and our cattle with thirst?" (Exodus 17:3). Moses cried to Yahweh — "They are almost ready to stone me" (Exodus 17:4) — and was directed to take his rod and strike the rock at Horeb in the sight of the elders. "Look, [my Speech] will stand before you there on the rock in Horeb; and you will strike the rock, and there will come water out of it, that the people may drink" (Exodus 17:6).
The naming etiology comes at the close of the episode. "And he called the name of the place Massah, and Meribah, because of the striving of the sons of Israel, and because they tried Yahweh, saying, Is Yahweh among us, or not?" (Exodus 17:7). The two names — Massah for the testing, Meribah for the striving — fix the place by the people's failure rather than by its geography.
The Backward Glance in Deuteronomy
Moses' addresses in Deuteronomy keep returning to Massah as a warning. "You⁺ will not try Yahweh your⁺ God, as you⁺ tried him in Massah" (Deuteronomy 6:16). The form is direct command: the place name carries the lesson. The longer rebellion-list adds it among the points where Israel provoked Yahweh: "And at Taberah, and at Massah, and at Kibroth-hattaavah, you⁺ provoked Yahweh to wrath" (Deuteronomy 9:22).
The blessing of Levi at the end of Deuteronomy frames Massah differently — as a proving rather than a guilt. "And of Levi he said, Bring to Levi your Thummim, and your Urim to your godly one, Whom you proved at Massah, With whom you strove at the waters of Meribah" (Deuteronomy 33:8). Here the testing is read as the trial through which Levi's fidelity was demonstrated.
The Psalmic Memorial
Psalm 95 makes Massah a present-tense warning to its hearers. "Do not harden your⁺ heart, as at Meribah, As in the day of Massah in the wilderness" (Psalms 95:8). The wilderness day becomes paradigmatic: a hardened heart at Massah is the figure of refusal that the worshipers are commanded not to repeat.