Musnad Ahmad 30:1217

'Abd al-Samad narrated to us, Hammad narrated to us, Khalid narrated to us, from Shahr, from Abu Hurayrah, who said: When the delegation of 'Abd al-Qays arrived, the Messenger of Allah (peace and blessings of Allah be upon him) said: "Every man is the reckoner of his own self; let every people drink from what appears to them."