1 Samuel 20:10

Who shall tell me? or what if thy father answer thee roughly? — The language in the original is here very abrupt and involved. Evidently the very words uttered in the memorable scene by the excited and sorrowful friends are remembered and reported.

The “if” supplied in the English Version probably is nearest the meaning intended to be conveyed by the broken, agitated words. Another rendering is, “If thy father shall answer thee harshly, who will declare it to me?”
“These questions of David were suggested by a correct estimate of the circumstances — namely, that Saul’s suspicions would lead him to the conclusion that there was some understanding between Jonathan and David, and that he would take steps, in consequence, to prevent Jonathan from making David acquainted with the result of his conversation with Saul.” — Keil.

In the next verse Jonathan leads David into a solitary spot — “the field” — where, before saying their last words together, they might agree upon some secret sign by means of which Saul’s real mind towards David might be communicated, if necessary, by Jonathan to his friend.