The Prophet ﷺ said, "If any of you knew what burden he takes upon himself by passing in front of his brother while he is praying, standing for a hundred years would be better for him than the single step he took."
حدثنا أبو بكر بن أبي شيبة حدثنا وكيع عن عبيد الله بن عبد الرحمن بن موهب عن عمه
قال النبي ﷺ لو يعلم أحدكم ما له في أن يمر بين يدي أخيه معترضا في الصلاة كان لأن يقيم مائة عام خير له من الخطوة التي خطاها
No references are available.
[Its chain of transmission is daif] * Ubaydullah is not strong (Taqrib), and his paternal uncle is obscure. Imam Shafii said, "We do not know him" (Tahzeeb).