Ruling on reciting the full tashahhud in the first tashahhud

Question:
He says about himself: I used to recite the entire tashahhud in the first tashahhud in the past. Is what I used to do valid?

Answer:
There is no blame on you regarding sin, but the sunnah (recommended practice) is to stop at the end of the prayer upon the Prophet (peace and blessings be upon him). The supplication remains in the final tashahhud. This is the sunnah (recommended practice) after finishing the prayer upon the Prophet (peace and blessings be upon him): you stand up for the third rak'ah. This is what is prescribed. The Prophet (peace and blessings be upon him), when he finished this, would stand up, and he would supplicate in the final tashahhud, seeking refuge in Allah from the punishment of the Hellfire, and so on.
So you must follow the Prophet (peace and blessings be upon him), and the supplication should be in the final tashahhud. As for the first tashahhud, it ends with the prayer upon the Prophet (peace and blessings be upon him). Once you have prayed upon the Prophet (peace and blessings be upon him), you stand up for the third rak'ah. However, there is no blame on you for what has passed; because you made supplications in a place where they are not due, this does not invalidate the prayer, but you have deviated from what is prescribed. Yes.

The presenter: And Allah is the Helper, may Allah reward you with good.