Musnad Ahmad 30:1835

Sa'id ibn Mansur narrated to us, he said: 'Abd al-'Aziz ibn Muhammad narrated to us, from Suhayl ibn Abi Salih, from his father, from Abu Hurayrah, who said: When the Messenger of Allah (may Allah bless him and grant him peace) would congratulate a person, he would say: "May Allah bless for you, and bless upon you, and bring you both together in goodness."