TgO Deut21:4 :וְיִקפוֹן תַמָן יָת עַגַלתָא בְנַחלָא‏ : they shall slaughter the calf there in the wadi [by cutting at the neck =MT וְעָרְפוּ־שָׁם אֶת־הָעֶגְלָה בַּנָּחַל]
See the entire entry for nqp#2 vb. to adhere to; to knock together