In one narration the words are: "Blessing has been placed for my Ummah in their morning endeavours."
Abu Ya'la and al-Tabarani in al-Kabir recorded it. Its chain contains Ali bin Abis, who is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب البيوع / 6216