BT Šab 82a(1) :ולא קטיל לכו כינא אמנא‏ : you have not killed a louse on (your) garment
See the entire entry for kinnā n.m. louse

BT Šab 82a(1) :דלא קא מקנחיתו לכו בחספא ולא קטיל לכו כינא אמנא ְ‏ : you aren't scraping yourself with a sherd, nor is there a killed louse on your clothing
See the entire entry for qnḥ vb. D to wipe off