Muhammad bin Al hasan Al Mukhzumi said“The sentence“that which is not reached by the Camel hoofs”means that the Camels eat (the arak trees) within the reach of their heads. So the land (where the arak trees are growing) may be protected beyond such a region.

Narrated Abyad ibn Hammal: Abyad went to the Messenger of Allah صلی اللہ علیہ وسلم and asked him for assigning him (the mines of) salt as fief. (The narrator Ibn al-Mutawakkil said: which was in Ma'arib.) So he assigned it to him as a fief. When he returned, a man in the meeting asked: Do you know what you have assigned him as a fief? You have assigned him the perennial spring water. So he took it back from him. He asked him about protecting land which had arak trees growing in it. He replied: He could have such as was beyond the region where the hoofs (of camels) went. The narrator Ibn al-Mutwakkil said: "that is the camel hoofs. "