ביום השבת ביום השבת יערכנו לפני ה’ תמיד… (אמור כד:ח)

The holy Rebbe Reb Yeshaya Ztz”l of Pszedborsz (Poland) says in the name of the Holy Rabbi Nosson Schapira Ztz’’l, who was the Rav of Cracow (Poland) and author of the classic Megaleh Amukos, a commentary on the Torah: Mitzvos that a person performs during weekdays are making their way to the high heavens either during the night or on the holy day of Shabbos, but a Mitzva that is performed during Shabbos – goes up the same day – on Shabbos, without delay because the following night it is no more Shabbos.  (Tiferes Shlomo)