Answer: Truthfulness means saying what conforms with the reality or what is true.

Examples include:

. Truthfulness in talking with people

. Truthfulness in making a promise

. Truthfulness in every word and deed

The Prophet (may Allah's peace and blessings be upon him) said: "Adhere to truthfulness, for truthfulness leads to righteousness and righteousness leads to Paradise. A man will keep speaking the truth until he becomes of the most truthful." [Agreed upon]