Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 20
Sanskrit:
वरं वृणीष्व भद्रं ते ऋते कैवल्यमद्य न: ।एक एवेश्वरस्तस्य भगवान् विष्णुरव्यय: ॥ २० ॥
ITRANS:
varaṁ vṛṇīṣva bhadraṁ teṛte kaivalyam adya naḥeka eveśvaras tasyabhagavān viṣṇur avyayaḥ
Translation:
“All good fortune to you! Now please choose a benediction from us — anything but liberation, since only the infallible Supreme Lord, Viṣṇu, can bestow that.”