Hazrat Ikrimah bin Khalid bin As narrates to Sayyiduna Tawus that a man said to Sayyiduna Abdullah bin Umar (may Allah be pleased with them), "Will you not perform Jihad?" So Abdullah bin Umar (may Allah be pleased with them) replied, "Indeed, I heard the Messenger of Allah (peace and blessings be upon him) say: 'Islam is built upon five things: bearing witness that there is no deity worthy of worship except Allah, establishing prayer, giving zakat, fasting in Ramadan, and performing Hajj to the House of Allah.'"