Sayyiduna Anas bin Malik (may Allah be pleased with him) states: I heard the Prophet (peace and blessings be upon him) say: "Of my brothers among the prophets who passed before me, the number was eight thousand; then came Sayyiduna Isa bin Maryam (peace be upon him), and then I was sent."
Abu Ya'la recorded it; its chain contains Muhammad bin Thabit al-Abdi, who is da'if (weak), and this hadith is mentioned in his biography.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / ( كتاب فيه ذكر الأنبياء ) صلوات الله تعالى وسلامه على نبينا محمد وعليهم أجمعين / 13814