פירוש על ברכות 10:21

M. adds: Another version : it was taught in a tradition: Abba Benjamin says.

It Abba Benjamin prayed "before his bed" in this sense, he acted contrary to the quoted teaching. The reason why it is recommended to face the wall with nothing intervening is to avoid distraction.

He used the word "before" in the sense of time, not place. Immediately on rising, he offered his prayers.