SBE 48: The Vedanta-Sutras with commentary by Ramanuja, G...
Earth originates from water; for so the texts declare 'From water earth' (Taitt Up. II. 1, 1). 'It (water) sent forth food' (Kh. Up. VI, 2, 3). But how can the word 'food' denote earth?--To this the next Sûtra replies.