The ruling on sending blessings upon the Prophet (peace and blessings be upon him) in the first tashahhud

Question:
Also, if one adds to the first tashahhud in the first two rak'ahs, is the prostration for forgetfulness required of him?

Answer:
No. Adding the sending of blessings upon the Prophet (peace and blessings be upon him) is recommended. It is recommended to send blessings upon the Prophet (peace and blessings be upon him) in the first tashahhud. If one adds supplication after sending blessings upon the Prophet (peace and blessings be upon him), the matter is broad in this regard, and the prostration is not required of him. This is because this addition does not invalidate the prayer; its worst outcome is that it is not prescribed. If he prostrates for forgetfulness, it does no harm. If he does something that is not prescribed in the prayer and prostrates for forgetfulness, it does not harm him. This is because the rule is that the prostration for forgetfulness is obligatory only if one does something that invalidates the prayer intentionally. If one does something in the prayer that invalidates the prayer intentionally out of forgetfulness, then the prostration for forgetfulness is obligatory upon him. However, if the thing does not invalidate the prayer intentionally—by doing a specific thing that does not invalidate it, or by doing something not prescribed that does not invalidate it—then the prostration for forgetfulness is not required of him... Yes.

The presenter: May Allah reward you with good.