Musnad Ahmad 30:3762

Hammad narrated to us, and Abu al-Nadr narrated to us, from Ibn Abi Dhi’b, from Ibn Shihab, from Abu Salamah and Ibn al-Musayyib, from Abu Hurairah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "When you hear the Iqamah, walk, and do not hasten, and upon you is tranquility. So whatever you catch, pray, and whatever you miss, complete it." And Abu al-Nadr said: "So come, and upon you is tranquility."