The hadeeth, “There is no prayer for the one who lets his garment hang below his ankles”, and the ruling on the prayer of one who lets his garment hang below his ankles
Question

                I heard a hadeeth in which the Prophet (peace and blessings of Allaah be upon him) said, “There is no prayer for the one who lets his garment hang below his ankles.” Does this refer to the one who does that when praying or the one who does that in his daily life?.
Praise be to Allah. 
          It was reported in a hadeeth narrated 
          by Abu Dawood that Abu Hurayrah said: “Whilst a man was praying with 
          his izaar (lower garment) hanging below his ankles, the Messenger of 
          Allaah 
          
          (peace and blessings of Allaah be upon him) said: “Go and do wudoo’.”… 
          He said, “He was praying with his izaar hanging below his ankles, and 
          Allaah does not accept the prayer of a man who lets his izaar hang below 
          his ankles. (Narrated by Abu Dawood, al-Salaah, 543. This was 
          classed as da’eef (weak) by al-Albaani in Da’eef Sunan Abi Dawood, 
          no. 124). 
 
          With regard to the validity of prayer, 
          Shaykh Ibn ‘Uthaymeen was asked about that and he said: If the garment 
          is hanging down below the ankles, then it is haraam, because the Prophet 
          
          (peace and blessings of Allaah be upon him) said, “Whatever part of 
          the izaar (lower garment) is hanging down below the ankles is in the 
          Fire.” What the Prophet 
          
          (peace and blessings of Allaah be upon him) said concerning the izaar 
          also applies to other types of clothing. 
 
          Based on this, a person has to lift his 
          thobe (galabiyah) or other garments to be above his ankles. If he prays 
          in it when it is below his ankles, then there is a difference of opinion 
          among the scholars as to whether his prayer is valid. 
 
          Some of them think that his prayer is 
          valid, because this man has done what is obligatory, i.e., covering 
          his ‘awrah. 
 
          Some of them think that his prayer is not valid, because 
          he has covered his ‘awrah with a haraam garment. They say that one of 
          the conditions of covering the ‘awrah is that the garment worn should 
          be permissible. So a man is in danger if he prays in a garment that 
          comes down below his ankles; he should fear Allaah and raise his garment 
          so that it will be above his ankles.
 
          Fataawa Ibn ‘Uthaymeen, 
          part 12, p. 306