Śrīmad-Bhāgavatam · Text 6.1.38
Who is speaking and story frame
श्रीविष्णुदूता ऊचु:
यूयं वै धर्मराजस्य यदि निर्देशकारिण: ।
ब्रूत धर्मस्य नस्तत्त्वं यच्चाधर्मस्य लक्षणम् ॥ ३८ ॥
śrī-viṣṇudūtā ūcuḥ
yūyaṁ vai dharma-rājasya
yadi nirdeśa-kāriṇaḥ
brūta dharmasya nas tattvaṁ
yac cādharmasya lakṣaṇam
The blessed messengers of Lord Viṣṇu, the Viṣṇudūtas, said: If you are actually servants of Yamarāja, you must explain to us the meaning of religious principles and the symptoms of irreligion.
Read Śrīla Prabhupāda's purport on Vedabase.io