Does the prayer become invalid if the one praying recites the transmitted supplication and then supplicates for matters of this world?

Question:
Honorable Shaykh, may Allah grant you success, you mentioned (may Allah preserve you) in a previous lesson that if a person restricts his supplication in the prayer to matters of this world, his prayer is invalid. Yes. If he says the transmitted supplication between the two prostrations and the supplication after the final tashahhud, saying that transmitted supplication and then supplicating for matters of this world, does his prayer become invalid?

Answer:
That is if he restricted it to this world. If he supplicated to Allah for matters of the Hereafter and then supplicated for matters of this world, that is not restriction. The point is, if all the supplication in the prayer is for matters of this world, his prayer is invalid. Yes.