Indra, the King of heaven, could immediately understand his mistake. Realizing he had disrespected his spiritual master, he condemned himself in the presence of all the members of the assembly.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तर्ह्येव प्रतिबुध्येन्द्रो गुरुहेलनमात्मनः । गर्हयामास सदसि स्वयमात्मानमात्मना
tarhyeva pratibudhyendro guruhelanamātmanaḥ | garhayāmāsa sadasi svayamātmānamātmanā
SB 6.7.10