Srimad-Bhagavatam: Canto 4 - Chapter 1 - Verse 15
Sanskrit:
वधान्निवृत्तं तं भूयो हन्तवेऽत्रिरचोदयत् ।जहि यज्ञहनं तात महेन्द्रं विबुधाधमम् ॥ १५ ॥
ITRANS:
vadhān nivṛttaṁ taṁ bhūyohantave ’trir acodayatjahi yajña-hanaṁ tātamahendraṁ vibudhādhamam
Translation:
When Atri Muni saw that the son of King Pṛthu did not kill Indra but returned deceived by him, Atri Muni again instructed him to kill the heavenly King because he thought that Indra had become the lowliest of all demigods due to his impeding the execution of King Pṛthu’s sacrifice.