四分律刪繁補闕行事鈔 2.241

2.241

五受食處，《明了論》：求得在此處，地及水中、空中，不成。如前受中說。

Fifth, the place of receiving food. The *Vinayavibhāṣā* states: 'Seeking and obtaining in this place'; on the ground, in water, or in mid-air, it is not effected. As explained above under receipt.