Musnad Ahmad 30:1610

Abu Salamah narrated to us, Abd al-Aziz al-Darawardi informed us, from Amr ibn Abi Amr, from al-Maqburi, from Abu Hurairah, from the Prophet, may God bless him and grant him peace, who said: "God, the Almighty and Majestic, said: 'The believer, in My estimation, is in the position of every good; he praises Me while I extract his soul from between his two sides.'"