Nakhasikhāsutta

sn13.1:1.1 So I have heard.

sn13.1:1.2 At one time the Buddha was staying near Sāvatthī in Jeta’s Grove, Anāthapiṇḍika’s monastery.

sn13.1:1.3 Then the Buddha, picking up a little bit of dirt on his fingernail, addressed the mendicants:

sn13.1:1.4 “What do you think, mendicants?

sn13.1:1.5 Which is more: the little bit of dirt on my fingernail, or this great earth?”