One verse

Srimad Bhagavatam 4.19.14

4.19.14

तं ताद‍ृशाकृतिं वीक्ष्य मेने धर्मं शरीरिणम् । जटिलं भस्मनाच्छन्नं तस्मै बाणं न मुञ्चति ॥ १४ ॥

tam tadrsakrtim viksya mene dharmam saririnam jatilam bhasmanacchannam tasmai banam na muncati

tam
him
tadrsa-akrtim
in such dress
viksya
after seeing
mene
considered
dharmam
pious or religious
saririnam
having a body
jatilam
having knotted hair
bhasmana
by ashes
acchannam
smeared all over the body
tasmai
unto him
banam
arrow
na
not
muncati
he did release.

King Indra was fraudulently dressed as a sannyasi, having knotted his hair on his head and smeared ashes all over his body. Upon seeing such dress, the son of King Prthu considered Indra a religious man and pious sannyasi. Therefore he did not release his arrows.