Mahabharata 8.49.9

दद गाण्डीवमन्यस्मा इति मां योऽभिचोदयेत्छिन्द्यामहं शिरस्तस्य इत्युपांशुव्रतं मम

dada gāṇḍīvamanyasmā iti māṃ yo'bhicodayetchindyāmahaṃ śirastasya ityupāṃśuvrataṃ mama

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