注大乘入楞伽經 3.158

3.158

舉不淨門明其無我。然一切世間貪著此身不淨之聚，三十六物穢惡之軀，如彼飛蠅翫於臭處。我謂淨義，故知無我。

The gate of impurity is adduced to explain no-self. All in the world are greedily attached to this heap of impurities that is the body, a vessel of thirty-six foul things, like a fly frolicking in a foul place. An ātman implies purity; hence we know there is no self.