Sayyidah Aishah Siddiqah (may Allah be pleased with her) narrates: The Prophet (peace and blessings be upon him) said: "O Allah, bless my Ummah in their morning endeavours, and make it on Thursday."
Al-Tabarani recorded it in al-Awsat. Its chain contains Ammar bin Raja, and I have not found anyone who has given his biography.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب البيوع / 6221