The Final Truth: The source of revelation is God, so doubt must be cast aside.
This is a concluding affirmation to the Prophet and the believers that the direction of the Qibla and the message of the Qur'an are the absolute truth from God. Therefore, they should not be among the doubters. Eliminate lingering doubt. Once overwhelming evidence supports a truth, close the door on uncertainty. True conviction requires moving past endless deliberation to confident, practical belief.