פירוש על ברכות 56:1

Rab Joseph was the Principal of the Seminary at Pombedita, and used to deliver a discourse every Sabbath morning before the additional Tefillah.

Who resented Rab Iwya's absence.

M. : Raba.

I.e. a man may say the Tefillah at home before the Congregation says it in the Synagogue.