Musannaf Ibn Abi Shayba 18:355

Abu Bakr narrated to us, he said: Hatim ibn Wardan narrated to us, from Bard, from Makhul, he said: The *ja'ifah* (a wound that reaches the interior of the body) is that which is in the interior until it exits from the other side; [in that case, it is] two *ja'ifahs*.