Eeman means testifying all that concerns beliefs
Ibn Umar (Radi Allaahu Ta’ala Anhu) narrated the Holy Messenger of ALLAH said, Religion is the sum total of five things (all of them are fundamental) none of them is tenable without the other in the sense that it may completely relieve one from the Hell: testifying that there is no deity but ALLAH, belief in His angels, His Messenger, Paradise and Hell and that the dead will be raised to render their accounts. This is one of the things. Then there are five Salaah (daily) which constitute one of the pillars of Islam. Without Salaah ALLAH will not accept even Eeman (faith). Zakat is atonement for sins. Without Zakat ALLAH, will not accept Eeman and Salaah.