Musannaf Ibn Abi Shaybah 39129 — Sitting twice in the Friday sermon

Sayyiduna Qays bin Amr (may Allah be pleased with him) said: The Prophet (peace and blessings be upon him) saw a man praying two rak'ahs after the morning prayer, and he (peace and blessings be upon him) said: "Are you praying the morning prayer twice?" The man said: "I was not able to pray the two sunnah rak'ahs before the Fajr prayer, so I have prayed them now." He (peace and blessings be upon him) then remained silent.