What does 1 Samuel 14:17 mean?

Saul said to his men, 'Check who’s missing from our group.' When they counted, they realized Jonathan and his armor-bearer were gone. 1 Samuel 14:17 - Modern Text Bible

(Saul tries to figure out what’s going on and discovers that his own son and the armor-bearer are the ones missing—he realizes they must be behind the commotion.)