The early days of David's reign were marked by intense and strategic conflicts with regional powers. Recognizing the threat of his growing kingdom, the Philistines launched military campaigns to weaken his forces and preserve their dominance in the area. They knew David intimately, both from the time he spent living in their camp and from his reputation as a formidable adversary [ביאור שטיינזלץ]. Furthermore, they were eager to exact revenge against the Israelites and David's warriors, who had previously humiliated them in battle [רש״י].
The clash took place at Pas Dammim. The primary approach among commentators is that this is the same location as Ephes Dammim, famously known as the site of the earlier battle between David and Goliath [רש״י, רד״ק, מנחת שי, מצודת ציון, ביאור שטיינזלץ]. While the exact origin of the name remains a mystery [ביאור שטיינזלץ], parallel historical accounts also describe the location as an unwalled, open settlement [רד״ק].
During the conflict, the fighting reached a large agricultural estate [מצודת ציון]. The field was filled with a crop of barley, which the Philistines intended to harvest and then destroy by setting it on fire [רש״י]. Amidst the chaos, some of the Israelites who were fleeing from the Philistine advance used this very field as a hiding place [ביאור שטיינזלץ].
A notable detail emerges when comparing historical records of the event, as a parallel account describes the field as being full of lentils rather than barley [מצודת דוד, מנחת שי, רד״ק]. To resolve this difference, commentators offer two distinct perspectives. One approach suggests that these were actually two entirely separate battles that happened to take place in the same region [מצודת דוד]. Conversely, another perspective unifies the accounts into a single event. According to this view, the field itself had already been harvested, but it was being used to store gathered piles of crops from various other fields. Because these piles contained a mixture of both barley and lentils, one historical record chose to highlight the barley, while the other focused on the lentils [רד״ק].