Lakkhanasutta 2.7.4

2.7.4

so tato cuto itthattaṃ āgato samāno imaṃ mahāpurisalakkhaṇaṃ paṭilabhati, rasaggasaggī hoti, uddhaggāssa rasaharaṇīyo gīvāya jātā honti samābhivāhiniyo.

When he came back to this place he obtained this mark: he has ridged taste buds. His raised taste receptors, originating in the throat, disperse evenly.