Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 32
Sanskrit:
तस्य पत्नीसहस्राणां दशानां सुमहायशा: ।दशलक्षसहस्राणि पुत्राणां तास्वजीजनत् ॥ ३२ ॥
ITRANS:
tasya patnī-sahasrāṇāṁdaśānāṁ sumahā-yaśāḥdaśa-lakṣa-sahasrāṇiputrāṇāṁ tāsv ajījanat
Translation:
The famous Śaśabindu had ten thousand wives, and by each he begot a lakh of sons. Therefore the number of his sons was ten thousand lakhs.