שמואל א, פרק כ׳, פסוק י״א

A fateful conversation is about to take place, one that will reveal King Saul's true intentions and establish a lasting covenant. Because the matters at hand involve deep and highly sensitive secrets, absolute privacy is essential.

Recognizing this need, Jonathan takes the initiative to move their meeting to a secure location, suggesting they walk out into the field [ביאור שטיינזלץ]. The primary approach among commentators is that the open field offers a safe environment where they can share their secrets and speak peacefully, far from any interruptions [מלבי״ם, מצודת דוד, ביאור שטיינזלץ].

In a populated area, such as a house or a city, walls can easily conceal eavesdroppers. An open field, however, is entirely empty of people, completely eliminating the risk of being overheard [אלשיך]. Furthermore, the wide terrain provides an added layer of security. It allows the two men to look around and see for a great distance, ensuring that no one is secretly watching or approaching them—a level of caution that would be impossible to maintain inside a building or along narrow city alleys [רלב״ג].