Musnad Abu Ya'la al-Mawsili 159:119

Ishaq narrated to us, Abd al-Razzaq narrated to us, Ma'mar informed us, from Ibn Abi Layla, from 'Ata, from Abu Hurayrah: That the Messenger of Allah (may Allah bless him and grant him peace) prayed for blessing in the Suhoor and the Tharid.