Agnipurana 332.4

332.4

viparītākhyānikī ttau jayāgātau jagogatha /
saumalau gathalabhabhāvau bhaveddhariṇavallabhā //

Viparītākhyānikī is ttau, ja, yā, gā, tau, ja, go, ga; / sau, ma, lau, ga, then la, bha, bhā, vau becomes Hariṇavallabhā;