Manusmriti

siva.sh/manusmriti/2/195

प्रतिश्रावणसम्भाषे शयानो न समाचरेत् । नासीनो न च भुञ्जानो न तिष्ठन्न पराङ्मुखः ॥ १९५ ॥

sanskrit

Let him not answer or converse with (his teacher), reclining on a bed, nor sitting, nor eating, nor standing, nor with an averted face.

english translation

pratizrAvaNasambhASe zayAno na samAcaret | nAsIno na ca bhuJjAno na tiSThanna parAGmukhaH || 195 ||

hk transliteration by Sanscript