If one davened shemonei esrei at his house, can he later repeat shemonei esrei because of pores al shema when he arrives at shul.
Answer:
One who has already davened should not repeat Shmone Esrei with Pores Al Shma.
Sources:
While the opinion of Shulchan Aruch is to permit this [O:C 69:1], see the MIshna Brura there s"k 1, that the halacha follows the Radvaz and many others who prohibit this practice.
