It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Islam is ten shares, and whoever has no share has failed: the first is the testimony that there is no true god but Allah, and it is the religion (millah); the second is prayer, and it is the natural disposition (fitrah); the third is zakah, and it is purification; the fourth is fasting, and it is a shield; the fifth is Hajj, and it is the law (shari'ah); the sixth is jihad, and it is the striving on the battlefield; the seventh is enjoining good, and it is fidelity; the eighth is forbidding evil, and it is the proof; the ninth is the community (jama'ah), and it is mutual affection; and the tenth is obedience, and it is protection."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11908