Natyashastra
भुग्नं लजान्विते योज्यं यतीनां तु स्वभावजम् । निर्वेदौत्सुक्यचिन्तासु नये च विनिमन्त्रणे ॥ १५९॥
Bhugna—in being ashamed, despondency, impatience, anxiety, summoning. It is natural for the ascetics.
english translation
bhugnaM lajAnvite yojyaM yatInAM tu svabhAvajam । nirvedautsukyacintAsu naye ca vinimantraNe ॥ 159॥
hk transliteration by Sanscript