Mukhtasar Bukhari

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that he used to say: "Is the Sunnah of the Messenger of Allah (peace and blessings be upon him) not sufficient for you? If any of you is prevented from performing Hajj, he should perform Tawaf of the Ka'bah and of Safa and Marwah, then come out of all the restrictions of Ihram, until he performs Hajj the following year and offers a sacrifice. And if he cannot find a sacrificial animal, then he should fast." (Also read the ahadith of these chapters: Book: On the Explanation of Hajj... Chapter: The one who takes a sacrificial animal with him..., Book: On the Explanation of Umrah... Chapter: How many Umrahs did the Noble Prophet (peace and blessings be upon him) perform?)