Sayyiduna Abdullah bin Umar (may Allah be pleased with him) says: The Messenger of Allah (peace and blessings be upon him) used to command us to shorten the prayer, and he himself would lead us in prayer by reciting Surah As-Saffat.
Hadith Referenceالفتح الربانی / أبواب صلاة الجماعة / 2570