Natyashastra
लज्जानिगूढवदनो भूमिं विलिखन्नखांश्च विनिकृन्तन् । वस्त्राङ्गुलीयकानां संस्पर्शं व्रीडितः कुर्यात् ॥ ५९॥
The ashamed man will cover his face, draw lines on the ground, bite the nails and touch clothes and rings.
english translation
lajjAnigUDhavadano bhUmiM vilikhannakhAMzca vinikRntan । vastrAGgulIyakAnAM saMsparzaM vrIDitaH kuryAt ॥ 59॥
hk transliteration by Sanscript