Mahabharata 6.4.22

इष्टो वातः प्रविष्टस्य दक्षिणा प्रविविक्षतःपश्चात्संसाधयत्यर्थं पुरस्तात्प्रतिषेधते

iṣṭo vātaḥ praviṣṭasya dakṣiṇā pravivikṣataḥpaścātsaṃsādhayatyarthaṃ purastātpratiṣedhate

Our plain-language meaning of this verse is waiting for scholar review.