Gemara:

Berachot,  Rosh Hashana 

Halacha:

Shabbat,  Tefillah 

Collections: R' Grunstein Lack of Davening on Shabbat

References: Rosh Hashana: 4A ,  Berachot: 55A  

Description

Saying a מי שברך on Shabbat has FOUR problems with it: 1) An Interuption between Aliyot 2) Making your Mitzva [i.e.- the Aliya] "conditional" on getting the rewards in the Mi-Shebeirach [i.e.- being guarded from all sickness and beyond] 3) Having too much CONFIDANCE in your davening/Aliya 4) Petitioning/Requesting of G-d on Shabbat