Specifying a fixed number of dhikr for each day

Question:
If a Muslim hears about the virtue of dhikr and specifies a certain number for each day, such as saying "Subhan Allah wa bihamdih" (Glory be to Allah and His praise) one hundred times, or saying "La hawla wa la quwwata illa billah" (There is no power nor strength except with Allah) one hundred times, or saying "Subhan Allah" (Glory be to Allah) one hundred times, is there any harm in specifying this particular number?

Answer:
Yes, specifying a number without evidence is considered an innovation. However, for a person to increase his remembrance of Allah, to increase his tasbih (glorification) and tahlil (declaration of Allah's oneness), this is a required matter. But this should be done without establishing a specific custom unless there is evidence indicating that specific number. As for determining a number without evidence, this is not permissible. Yes.