Does wearing one's clothes below the ankles during prayer render one's prayer invalid?
Wearing clothing below the ankles is sinful in and of itself. However, it does not render the prayers of the one who does so invalid.
There is a hadîth that reports the Prophet (peace be upon him) as saying: “Indeed, Allah does not accept the prayer of a man who hangs his garments.”
This hadîth, though al-Nawawî declares it authentic in al-Majmû` (4/456) and in Riyâd al-Sâlihîn, is weak, since its chain of transmission contains Abû Ja`far who is unknown.
Moreover, its text is rejected because it goes against the broad principles of Islamic Law.
And Allah knows best.
Source: Islam Today
-- Al Arabiya Digital