Mahabharata 3.42.24
प्रतिजग्राह तत्पार्थो विधिवत्कुरुनन्दनःसमन्त्रं सोपचारं च समोक्षं सनिवर्तनम्
pratijagrāha tatpārtho vidhivatkurunandanaḥsamantraṃ sopacāraṃ ca samokṣaṃ sanivartanam
Our plain-language meaning of this verse is waiting for scholar review.