觀無量壽佛經義疏 2.71

2.71

「『次作水想。見水澄清，亦令明了，無分散意。』」顯上澄清，湛然不動，故云無分散意。二、變水成氷。

"'Next, form the visualization of water. See the water clear and pure, and also make it distinctly clear, without any scattered thought.'" To reveal the aforementioned clearness and purity, undisturbed and motionless, it is therefore said "without any scattered thought." Second, transforming water into ice.