The Prophet (ﷺ) said, "The part of an Izar which hangs below the ankles is in the Fire."
Sahih al-Bukhari Book 77, Hadith 5
← Previous Hadith I saw Bilal bringing a short spear (or stick) and fixing it in the ground, and then he proclaimed the Iqama of the prayer, and I saw Allah's Messenger (ﷺ) coming out, wearing a cloak with its sleeves rolled up. He then offered a two-rak`at prayer while facing the stick, and I saw the people and animals passing in front of him beyond the stick.

Sahih al-Bukhari Book 77, Hadith 4 Next Hadith → Allah's Messenger (ﷺ), "Allah will not look, on the Day of Resurrection, at a person who drags his Izar (behind him) out of pride and arrogance.

Sahih al-Bukhari Book 77, Hadith 6