Exodus Exodus 15:22-27
Three days past the sea, at bitter Marah, YHWH sweetens the water by a tree, binds Israel under the first statute before Sinai, and names himself for the first time as the one healing you — a covenant title the whole canon receives.
Genesis Genesis 20:1–18
Eighteen verses, two hundred eighty-two Hebrew words, and seven canonical first-mentions: prophet, dream, heal, fear-of-God, the verb to sin, integrity, innocence. The prophet enters Scripture as an intercessor for a Gentile king. The Gentile king speaks the integrity-of-heart formula David and Solomon will later inherit. The wombs of Gerar close so that the womb of Sarah can open. Genesis 20 is the canon's densest law-of-first-mention cluster outside Genesis 1–3, and the social location is the thing the chapter forces the reader to see.