Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 14

Sanskrit:

मौर्या ह्येते दश नृपा: सप्तत्रिंशच्छतोत्तरम् ।समा भोक्ष्यन्ति पृथिवीं कलौ कुरुकुलोद्वह ॥ १४ ॥

ITRANS:

mauryā hy ete daśa nṛpāḥsapta-triṁśac-chatottaramsamā bhokṣyanti pṛthivīṁkalau kuru-kulodvaha

Translation:

O best of the Kurus, these ten Maurya kings will rule the earth for 137 years of the Kali-yuga.

Purport:

Although nine kings are mentioned by name, Daśaratha appeared after Sujyeṣṭha, before the rule of Saṅgata, and thus there are ten Maurya kings.