יהושע, פרק י״ד, פסוק י״ד

The city of Hebron is granted to Caleb son of Jephunneh as a personal reward for his absolute loyalty to God, rather than as part of the regular division of the land. Instead of receiving this territory through the normal lottery system used to assign portions among his family and tribe, it is given to him as a special, individual grant [מצודת דוד].

The specific reason for this unique privilege is clearly established [מצודת ציון]. Caleb receives Hebron because he fulfilled his destiny, remaining steadfast and following God completely [מצודת דוד, ביאור שטיינזלץ].