The ruling on praying in short trousers
Machine translationRead the Arabic original
Question:
Some young men, Honorable Shaykh, pray in shorts, and by shorts I mean the small trousers that expose the knee,
Answer:
It is not permissible unless there is a covering garment over them. As for limiting oneself to short trousers that expose the knee, the prayer is invalid; because the knee is part of the 'awrah (the part of the body that must be covered). The 'awrah of a man is what is between the navel and the knee, and the knee is included. Therefore, the 'awrah must be covered. Yes.
Some young men, Honorable Shaykh, pray in shorts, and by shorts I mean the small trousers that expose the knee,
Answer:
It is not permissible unless there is a covering garment over them. As for limiting oneself to short trousers that expose the knee, the prayer is invalid; because the knee is part of the 'awrah (the part of the body that must be covered). The 'awrah of a man is what is between the navel and the knee, and the knee is included. Therefore, the 'awrah must be covered. Yes.
Source
نور على الدرب - الفوزان - 02/248 — archive.org (7:38)
The Arabic text is a machine transcription of the audio recording.