Natyashastra
यदधः सकृदाक्षिप्तमवधूतं तु तच्छिरः । सन्देशावाहनालापसंज्ञादिषु नदिष्यते ॥ २९॥
Avadhuta: When the head is lowered once after turning it up it is called Avadhuta. (Uses): It is to be applied in [communicating] a message, invoking [a deity], conversation and beckoning [one to come near].
english translation
yadadhaH sakRdAkSiptamavadhUtaM tu tacchiraH । sandezAvAhanAlApasaMjJAdiSu nadiSyate ॥ 29॥
hk transliteration by Sanscript