PTKil 32.d:24[2] :מאן דאמ׳ מותרות דהוא שנץ גרמיה והיא נחתא לה‏ : (how does one account for) the one who explained it as 'released'? He had tightened it on himself and then it fell down
See the entire entry for šnṣ vb. to tighten