Ramayana
स निक्षिप्य सुतं ज्येष्ठं पौरेषु मधुरेश्वरम् । तप उग्रं समातिष्ठत्तापयन्सर्वदेवताः ॥ 7-84-10 ॥
"Having entrusted his eldest son, the lord of Madhura, to the citizens, he undertook fierce austerity, tormenting all the gods thereby."
english translation