There is no difference of opinion amongst the scholars with regards to covering/non-covering of the ankles. All the scholars, regardless of their different schools of thought and differences in many issues, have no difference of opinion in this regard. They all unanimously agree that the length of the lower garment, i.e. the trousers/pants/izars etc. should be above the ankles for men. Thus it is forbidden for men to cover their ankles with their lower garments i.e. trousers/pants/izars etc. There are several authentic Ahadith to substantiate this ruling.
Narrated Abu Huraira
Allah’s Messenger (pbuh) said, “Allah will not look, on the Day of Resurrection, at a person who drags his Izar (behind him) out of pride and arrogance.” (Sahih Bukhari, Vol. 7, Hadith no. 5788)
There may be few Muslims who tend to differ on the subject due to ignorance. They argue by saying �the Hadith says that anyone who drags the Izar out of pride and arrogance will be punished in the hereafter. Therefore we don�t drag the pants out of pride and arrogance�.
However, there are many Ahadith in which the Prophet has instructed in unambiguous words to wear the Izar above the ankles without mentioning the aspect of pride or arrogance. One of the Ahadith is as follows:
Narrated Abu Huraira
The Prophet said, “The part of an Izar which hangs below the ankles is in the Fire.” (Sahih Bukhari, Vol. 7, Hadith no. 678)
In the Hadith quoted above, there is a general instruction to keep the trouser above the ankle, irrespective whether it is out of pride & arrogance or without pride & arrogance.
Moreover, can any human being claim to be as humble as the Prophet (pbuh)? Alhumdulillah, we Muslims believe that the Prophet (pbuh) was far more humble than anyone of us can ever be and he could never be as arrogant & proud as we can be at any given time. He was sent as a mercy (Al-Qur’an 21: 107) for all the creatures, yet he wore his lower garments above the ankles. Therefore we should obey the commandment of the Prophet (pbuh) in order to prosper in the hereafter.