Shaykh-ul-Islaam Ibn Taymiyyah was asked about the saying of the Prophet (sallallaahu ‘alayhi wa sallam) said, “The invocation of my brother Yunus: “None has the right to be worshipped save You; glory be to You, far removed are You from any imperfection; I have been amongst the wrongdoers,” None who is experiencing difficulty employs it except that Allaah would relieve him of his difficulty.”

What is the meaning of this d’uaa?