法苑珠林 7.21

7.21

復何因緣名阿吒吒地獄。此諸眾生以極苦惱逼切其身。但得唱言阿吒吒阿吒吒。然其舌聲不能出口。是故名為阿吒吒地獄。

Furthermore, for what cause and reason is it called the Aṭaṭa hell? Because extreme suffering and distress press closely upon their bodies, they can only utter the sound ‘Aṭaṭa, aṭaṭa’, yet the sound of their tongues cannot leave their mouths. Therefore, it is called the Aṭaṭa hell.