TT #733 · Parashas Ki Seitzei · Seventh Aliyah · Passuk 25:09
Then his yevamah shall approach him in the presence of the elders, and draw his shoe off his foot, and spit in his face, and respond and say: “Thus shall be done to the man who will not build up his brother’s house.”
Torah Temimah points to Yevamot 101a–b.
TT lemma: וְחָלְצָה נַעֲלוֹ.
בָּעֵי רַבִּי יַנַּאי: קְרַעְתְּהוּ מַהוּ? שְׂרַפְתְּהוּ מַהוּ? מִי בָּעֵינַן גִּלּוּי כְּרָעַי וְהָא אִיכָּא, אוֹ דִּילְמָא חֲלִיצָה בָּעֵינַן וְלֵיכָּא? תֵּיקוּ.
English: Rabbi Yannai asked: If she tore it, what is the law? If she burned it, what is the law? Do we require the uncovering of the foot — and that is present — or do we require the act of drawing off — and that is absent? The question remains unresolved.
On the daf / in context: The essential nature of “chalitzah” (drawing off) versus mere exposure of the foot is left as a teiku.
Unresolved inquiry (teiku) on the essence of the act.
Whether destroying the shoe while it is on the foot constitutes valid chalitzah remains an open question.