Answer: 1. Belief in Allah Almighty

2. Belief in His angels

3. Belief in His books

4. Belief in His messengers

5. Belief in the Last Day

6. Belief in destiny, with the pleasant and unpleasant aspects thereof

Evidence lies in the famous Hadīth of Jibrīl (Gabriel) that was narrated by Muslim. Gabriel (peace be upon him) said to the Prophet (may Allah’s peace and blessings be upon him): "'Tell me about faith.' He said: 'It is to believe in Allah, His angels, His books, His messengers, the Last Day, and destiny with the pleasant and unpleasant aspects thereof.'"