Truthfulness (ṣidq) is a foundational virtue in Islam that shapes a believer's character and relations. The Qur'an commands honesty and condemns lying as a major sin.
Allah says:
يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ ٱتَّقُوا۟ ٱللَّهَ وَكُونُوا۟ مَعَ ٱلصَّـٰدِقِينَ
"O you who have believed, fear Allah and be with those who are true."
— Surah At-Tawbah (9:119)
The Prophet ﷺ said:
"إِنَّ ٱلصِّدْقَ يَهْدِىٓ إِلَى ٱلْبِرِّ وَإِنَّ ٱلْبِرَّ يَهْدِىٓ إِلَى ٱلْجَنَّةِ..."
"Truthfulness leads to righteousness, and righteousness leads to Paradise..."
— Sahih al-Bukhārī (6094), Sahih Muslim (2607)
Truthfulness covers words and actions. It builds trust and prevents corruption. The companions, such as Abu Bakr (RA), were known as as-Siddiq (the truthful) for their integrity.
Conversely, the Prophet ﷺ warned against lying, saying it leads to hypocrisy:
"إِيَّاكُمْ وَالْكَذِبَ، فَإِنَّ الْكَذِبَ يَهْدِى إِلَى الْفُجُورِ..."
"Beware of lying, for lying leads to wickedness..."
— Sahih al-Bukhārī (6095)
Islam urges Muslims to speak truth even when it is difficult, as truthfulness is a sign of strong faith and trustworthiness.