釋禪波羅蜜次第法門 3.39

3.39

今明因止證五輪。五輪者：一、地輪；二、水輪；三、風輪；四、金沙輪；五、金剛輪。此五法門，悉是借譬立名。通名為輪者，轉也。如世輪若轉，離此至彼。禪中明輪亦爾，如地輪因離下地亂心，轉至上地，故名為輪。乃至金剛輪義亦復如是，轉至無學極果故。

Now we explain realizing the five wheels through stopping. The five wheels are: first, the earth-wheel; second, the water-wheel; third, the wind-wheel; fourth, the gold-sand wheel; fifth, the vajra-wheel. These five Dharma gates are all named by borrowing metaphors. They are generally named 'wheels' in the sense of turning: just as when a worldly wheel turns, it leaves here and reaches there, so too is the explanation of wheels in dhyāna. For instance, because the earth-wheel leaves the turbulent mind of the lower ground and turns to reach the upper ground, it is called a wheel. And so on up to the vajra-wheel, its meaning is also like this, because it turns to reach the ultimate fruit of the non-learner.