The Compendium of Bheḷa 4.5.21

4.5.21

yas tvāt magurūṇāṃ[-gu] mānayitā paścād dveṣī caṇḍaḥ krodhano jñātīnāṃ bhedako bhavati tamāsuraṃ kāyam iti vidyāt ||

One who honors his own elders [at first] but later hates them, is fierce, wrathful, and creates division among kinsmen—one should know him as having the body of an asura.