阿彌陀經疏 1.154

1.154

經曰：「即以食時還到本國飯食經行」，次釋第二限晨旋路也。謂限晨至齋時即便還歸國，即任持圓淨也。謂或以大乘法味喜樂持身，故飲食已說法誦經。經行者，謂旋遶思惟。

The sūtra says: "And at mealtime, they return to their own land to take food and practice walking meditation." Next, this explains the second: returning on the road limited to morning. It means that restricted from morning to mealtime, they immediately return to their land; this is the perfect purity of sustaining. It means they sustain their bodies either through the flavor of the Great Vehicle's Dharma and joy; therefore, having taken food, they explain the Dharma and recite the sūtras. Walking meditation means circumambulating and contemplating.