2. Certainty (al-Yaqīn) — Negating Doubt

Name: The Conditions of La ilaha illa Allah
Author: Compiled from the works of Hafiz al-Hakami and Shaykh Ibn Baz

English Translation

The heart must affirm it with no trace of doubt. 'The believers are only those who believed in Allah and His Messenger, then did not doubt.' (al-Hujurāt 49:15).