Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 1
मैत्रेय उवाचसत्सेवनीयो बत पूरुवंशोयल्लोकपालो भगवत्प्रधान: ।बभूविथेहाजितकीर्तिमालांपदे पदे नूतनयस्यभीक्ष्णम् ॥ १ ॥
maitreya uvācasat-sevanīyo bata pūru-vaṁśoyal loka-pālo bhagavat-pradhānaḥbabhūvithehājita-kīrti-mālāṁpade pade nūtanayasy abhīkṣṇam
The great sage Maitreya Muni said to Vidura: The royal dynasty of King Pūru is worthy to serve the pure devotees because all the descendants of that family are devoted to the Personality of Godhead. You are also born in that family, and it is wonderful that because of your attempt the transcendental pastimes of the Lord are becoming newer and newer at every moment.
The great sage Maitreya thanked Vidura and praised him by reference to his family glories. The Pūru dynasty was full of devotees of the Personality of Godhead and was therefore glorious. Because they were not attached to impersonal Brahman or to the localized Paramātmā but were directly attached to Bhagavān, the Personality of Godhead, they were worthy to render service to the Lord and His pure devotees. Because Vidura was one of the descendants of that family, naturally he engaged in spreading wide the ever-new glories of the Lord. Maitreya felt happy to have such glorious company as Vidura. He considered the company of Vidura most desirable because such association can accelerate one’s dormant propensities for devotional service.