What is the ruling on the saying: "The Messenger of Allah, peace and blessings be upon him, has spoken the truth" upon finishing the recitation of a Prophetic Hadith?

It is not from the Sunnah to say "The Messenger of Allah, peace and blessings be upon him, has spoken the truth" after reciting a hadith, nor to say "Allah, the Most High, has spoken the truth" after finishing the words of Allah or His Messenger. This is because such practices are innovations that were not known during the time of the Prophet, peace and blessings be upon him, nor by the righteous predecessors.

However, it is permissible to say "Allah has spoken the truth" when an event occurs that confirms what Allah has informed, for example, "Indeed, your wealth and your children are but a trial," or "The Messenger of Allah has spoken the truth" when an event occurs that confirms his words.