The writer continues to use parallelism in verses 18 and 19, conveying a single idea using two different statements to emphasize God's acts of chastening and healing. (See: [[rc://en/ta/man/translate/figs-parallelism]])
The use of increasing numbers such as "six" and "seven" represents the idea of many, many times. AT: "He will rescue you out of trouble over and over again; indeed, time after time, no evil will touch you" (See: [[rc://en/ta/man/translate/figs-metaphor]])