It is narrated from Hazrat Suraqah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) stood in the valley to deliver a sermon and said: "Be aware! Until the Day of Resurrection, ‘Umrah has been included in Hajj."
Hadith Referenceمسند احمد / مسند الشاميين / 17582
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا الإسناد منقطع، طاؤوس لم يسمعه من سراقة