A CRAG — a rock-face, a cliff, a stone outcrop you could stand on or hide in; distinct from tzur, the boulder-like rock that Hebrew turns into a divine title. ⚠ The distinction decides how to read Numbers 20. Israel's first water-from-rock was at a tzur, and God said STRIKE it (Exodus 17:6, already on these pages). The second is at a sela, and God says SPEAK to it — and Moses strikes. Different noun, opposite instruction, thirty-eight years apart, and of ten versions checked on both shelves only the NWT 1984 renders the two words differently ('crag' here, 'rock' there). This translation prints 'crag' for exactly that reason. The same word later names the Edomite stronghold Sela, the site Greek would call Petra, 'the rock'. → first discussed at Num 20:8