Manusmriti

siva.sh/manusmriti/4/51

छायायामन्धकारे वा रात्रावहनि वा द्विजः । यथासुखमुखः कुर्यात् प्राणबाधभयेषु च ॥ ५१ ॥

sanskrit

In the shade or in darkness a Brahmana may, both by day and at night, do it, assuming any position he pleases; likewise when his life is in danger.

english translation

chAyAyAmandhakAre vA rAtrAvahani vA dvijaH | yathAsukhamukhaH kuryAt prANabAdhabhayeSu ca || 51 ||

hk transliteration by Sanscript