Musnad Abu Ya'la al-Mawsili 109:18

Ishaq narrated to us, Sufyan narrated to us, from Abdullah bin Muhammad bin Aqil and Muhammad bin al-Munkadir, from Jabir bin Abdullah: That the Prophet (peace be upon him) ate meat, then prayed and did not perform ablution. And that Abu Bakr ate meat, then prayed and did not perform ablution. And that Umar bin al-Khattab ate meat, then prayed and did not perform ablution.