haihayo nahuṣo veṇo
rāvaṇo narako 'pare
śrī-madād bhraḿśitāḥ sthānād
deva-daitya-nareśvarāḥ
haihayah nahushah venah -- Haihaya (Kartavirya), Nahusha and Vena; ravanah narakah -- Ravana and Naraka; apare -- others also; sri -- due to opulence; madat -- because of their intoxication; bhramsitah -- made to fall; sthanat -- from their positions; deva -- of demigods; daitya -- demons; nara -- and men; isvarah -- rulers.
As described by Sridhara Svami, because Haihaya stole the desire cow of Lord Parasurama's father, Jamadagni, Parasurama killed him and his impudent sons. Nahusha became puffed up when he temporarily assumed the post of Indra. When out of pride Nahusha ordered some brahmanas to carry him in a palanquin to an illicit meeting with Lord Indra's chaste wife, Saci, the brahmanas made him fall down from his position and become an old man. King Vena was similarly mad, and when he insulted the brahmanas they killed him by loud incantations of the syllable hum. Ravana was a famous ruler of the Rakshasas, but out of lust he kidnapped mother Sita, and thus her husband, Lord Ramacandra, killed him. Naraka was a ruler of the Daityas who dared to steal mother Aditi's earrings, and for his offense he was also killed. Thus throughout history powerful leaders have fallen from their positions because they became intoxicated with their so-called opulence.