kiṁ ca
nirdhanenāpi viprendra
kṛtvā caivātma-vikrayam
kartavyaṁ dīpa-dānaṁ tu
yāvat kārttika-pūrṇimā

kim- ca-furthermore; nirdhanena-penniless; api-even; viprendra-O king of brāhmaṇas; kṛtvā-doing; ca-and; eva-indeed; ātma-Himself; vikrayam-selling; kartavyam-to be done; dīpa-dānam-offering a lamp; tu-indeed; yāvat-when; kārttika-pūrṇimā-on the full-moon of Kārttika.

“O king of brāhmaṇas, when someone offers Him a lamp on the full-moon day of the month of Kārttika, Lord Kṛṣṇa, finding that He does not have sufficient money to repay that gift, gives Himself in exchange for that lamp.”

– Kārtik Mahatmya Text 121