While reading an English poem from Robert M. M'Cheyne (1813–1843), Jehovah Tsidkenu (= Jehovah our Righteousness) there is one stanza that reads
Jehovah Tsidkenu! my treasure and boast,
Jehovah Tsidkenu! I ne’er can be lost;
In thee I shall conquer by flood and by field,
My cable, my anchor, my breast-plate and shield!
I'm particularly interested to know the meaning of "conquer by flood and by field". I know what each word means on its own, yet this sounds like there's more to it than meets the eye.