Brochas Daf Beis amud aleph.

M'shah sh’haCohanim nichnosin l'echol b'Trumasan

How can they eat if this is the time to say Kria Shema? We are required to say Kria Shema before eating. The Ben Yehoyada says that each mitzva to which we (as opposed to others) have a particular connection, is more beloved and since trumah is particular to the Cohanim, they are permitted to give it precedence.