Every mitzvah one does on Shabbos is 500 times greater than a mitzvah performed on a weekday.
A daf Gemara studied on Shabbos is equivalent to studying 500 daf Gemara on a weekday.
A chapter of Tehillim on Shabbos equals 500 chapters of Tehillim on a weekday.
~ R’ Shlomke Zvhiller zt”l
Emuna Daily 
Is there a source for this?
yay tysm
thanks