Atharvaveda Samhita — Kanda 7 — Chapter 59

AV 7 59.1

यो नः शपाद् अशपतः शपतो यश् च नः शपात् । वृक्ष इव विद्युता हत आ मूलाद् अनु शुष्यतु

yo naḥ śapād aśapataḥ śapato yaś ca naḥ śapāt | vṛkṣa iva vidyutā hata ā mūlād anu śuṣyatu

Whoever shall curse us who do not curse, and whoever shall curse us as we curse — let him, like a tree struck by lightning, dry up from the root onward.

AI translation rendered from the Sanskrit, not a published edition