Brihajjataka 5.9

5.9

āpya udayam āpyagaḥ śaśī sampūrṇaḥ samavekṣate atha vā/
meṣu uraṇa bandhu lagnagaḥ syāt sūtiḥ salile na saṃśayaḥ//(vaitālīyā)

Or when the full Moon, occupying a watery sign, aspects a watery ascendant,
or is situated in the midheaven, fourth house, or ascendant, the birth takes place in water: of this there is no doubt.