See Turbo’s confession, Disput. § 9:  “And when they are going to eat bread, they first pray, speaking thus to the bread:  ‘I neither reaped thee, nor ground thee, nor kneaded thee, nor cast thee into the oven:  but another did these things and brought thee to me, and I am not to blame for eating thee.’  And when he has said this to himself, he says to the Catechumen, ‘I have prayed for thee,’ and so he goes away.”