Canto 1 - Boyhood
Bāla-kāṇḍa
Chapter 20: Daśaratha Refuses to Give Rāma
Text 1.20.17

पौलस्त्यवंशप्रभवो रावणो नाम राक्षसः॥

paulastya-vaṁśa-prabhavo rāvaṇo nāma rākṣasaḥ

paulastya-vaṁśa-prabhavaḥ = born in the dynasty of Pulastya; rāvaṇaḥ = Rāvaṇa; nāma = named; rākṣasaḥ = there is a rākṣasa.

There is a rākṣasa named Rāvaṇa born in the dynasty of Pulastya.