It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that a man came to the service of the Prophet (peace and blessings be upon him) and said, "O Messenger of Allah! Tell me, is performing ‘Umrah obligatory?" The Prophet (peace and blessings be upon him) replied, "No, but it is better (to do so)."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 14845
Hadith Gradingحکم دارالسلام:إسناده ضعيف، الحجاج بن أرطاة مدلس، وقد عنعن