When Ameerul Mu’mineen, Hadhrat Umar (Radhiyallahu anhu) was mortally wounded by the Shiah, and death was imminent, an A’raabi (village-dweller) came to visit him. When the A’raabi had just left, Hadhrat Umar (Radhiyallahu anhu) ordered the Sahaabah: “Call him back!” When the A’raabi returned, Hadhrat Umar (Radhiyallahu anhu) said: “O my Brother! Verily, I see your izaar (lungi) below your ankles. Tuck it up.”
Commenting, Allaamah Sha’raani (Rahmatullah alayh) said: “Look! How he (Hadhrat Umar) had admonished in this delicate time in which he was on the verge of death. He did not give any scope to the A’raabi (by abstaining from Amr Bil Ma’roof).”
Two vital lessons emerge from the conduct of H a d h r a t U m a r (Radhiyallahu anhu): (1) The absolute importance of Amr Bil Ma’roof Nahy Anil Munkar.

(2) The absolute importance of wearing the trousers above the ankles.
The view which the molvis and sheikhs of our age peddle on this issue, and their evil minimising of the importance of wearing the trousers above the ankles are inspirations of shaitaan.