This is a bid’ah

I know a person he sais when i ask Allah for something. i pray 2 rakah nafl. i recite in them 4 QUL and then when i conclude my prayer i recite 4 QUL ayatul kursi 99 names of Allah send blessing upon prophet We know that before dua we should make an act of worship. But my question is whether this is a bid’ah??

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