Q 40: What is the textual proof that the word Iman "Faith" is used to mean every aspect of the religion (of Islam)?
A--- The Prophet (Peace be upon him) said to the delegation of 'Abd AlQais: "I order you to believe in Allah Alone and asked them, 'Do you know what is meant by believing in Allah Alone?' They replied, 'Allah and His Messenger know better.' Thereupon the Prophet (Peace be upon him)
said: 'It means: to testify that none has the right to be worshipped but Allah, and Muhammad is Allah's Messenger, to offer Prayers, to pay the Zakah (obligatory charity), to observe fast during the month of Ramadan, and to pay AI-Khumus (one fifth of the booty to be given in Allah's Cause). (Bukhari and Muslim)
Reference: 200 FAQ On Muslims Belief - Shiekh Hafiz Ibn Ahmed Al Hakami