On Undercurrents (dakārgala) - Verse 87-88

If the trees—Jambū, Trivṛtā, Maurvī, Śiśumārī, Sārivā , Śivā , Śyāmā , Vīrudhī, Vārāhī , Jyotiṣmatī , Garuḍavegā, Sūkarika, Māṣaparṇī and Vyāghrapadā are seen to grow by the side of snake holes, there will be an undercurrent to the north of the holes at the distance of three cubits and at a depth of three men and a half.