Part 12 · Chapter 159

Also another reason, close to the aforementioned reason: for in the Mincha prayer we relied on the Shema of the morning, and on the remnants left over from the coupling of the morning; and likewise what remained of the Mochin after that coupling of the morning was made — from those remnants we make the coupling of the Mincha prayer. But it does not suffice also to make with it the coupling of the evening prayer, relying on the Mochin of the Shema of the morning, for they were already finished and cut off in the Mincha prayer.