Some Companions of the Prophet ﷺ reported,

While a man was praying with his lower garment hanging down past his ankles, the Messenger of Allah ﷺ said to him, "Go and perform ablution."So he went and performed ablution, then returned. The Messenger of Allah ﷺ said to him again, "Go and perform ablution."He went and performed ablution, then came back.Someone asked, "Messenger of Allah, what is the matter? Why did you order him to perform ablution and then remain silent?"He replied, "He was praying with his lower garment hanging down past his ankles, and Allah does not accept the prayer of a servant whose garment hangs down past his ankles."

قال حدثنا يونس بن محمد قال حدثنا أبان وعبد الصمد قال حدثنا هشام عن يحيى عن أبي جعفر عن عطاء بن يسار

عن بعض أصحاب النبي ﷺ قال

بينما رجل يصلي وهو مسبل إزاره إذ قال له رسول الله ﷺ اذهب فتوضأ قال فذهب فتوضأ ثم جاء فقال له رسول الله ﷺ اذهب فتوضأ قال فذهب فتوضأ ثم جاء فقال ما لك يا رسول الله ما لك أمرته يتوضأ ثم سكت قال إنه كان يصلي وهو مسبل إزاره وإن الله عز وجل لا يقبل صلاة عبد مسبل إزاره