Mudrā-vidhāna (Lalitopākhyāna): Āvāhanī–Saṃkṣobhiṇī–Ākarṣiṇī and allied Mudrās
एतस्या एव मुद्राया मध्यमे सरले यदि / क्रियते विन्ध्यदर्पारे मुद्रा विद्राविणी तथा
etasyā eva mudrāyā madhyame sarale yadi / kriyate vindhyadarpāre mudrā vidrāviṇī tathā
This very mudrā—if the middle finger is held straight in the center and it is performed upon the firm flank of the Vindhya—then it is likewise called the Vidrāviṇī Mudrā, the dispeller of obstacles.