1 Samuel 20 39
The boy didn't suspect anything—only Jonathan and David knew what it meant.
Compare with other 3 random translations
NLT 1 Samuel 20:39He, of course, suspected nothing; only Jonathan and David understood the signal.
YLT 1 Samuel 20:39And the youth hath not known anything, only Jonathan and David knew the word.
NCV 1 Samuel 20:39(The boy knew nothing about what this meant; only Jonathan and David knew.)