rivers ... not overflow thee - so in passing Jordan, though at its “overflow,” when its “swellings” were especially dangerous (Jos 3:15; Jer 12:5).
waters ... fire - a proverbial phrase for the extremest perils (Psa 66:12; also Psa 138:7). Literally fulfilled at the Red Sea (Exo 14:21, Exo 14:22), and in the case of the three youths cast into the fiery furnace for conscience’ sake (Dan 3:25, Dan 3:27).