One verse

Srimad Bhagavatam 9.16.12

9.16.12

याच्यमाना: कृपणया राममात्रातिदारुणा: । प्रसह्य शिर उत्कृत्य निन्युस्ते क्षत्रबन्धव: ॥ १२ ॥

yacyamanah krpanaya rama-matratidarunah prasahya sira utkrtya ninyus te ksatra-bandhavah

yacyamanah
being begged for the life of her husband
krpanaya
by the poor unprotected woman
rama-matra
by the mother of Lord Parasurama
ati-darunah
very cruel
prasahya
by force
sirah
the head of Jamadagni
utkrtya
having separated
ninyuh
took away
te
the sons of Kartaviryarjuna
ksatra-bandhavah
not ksatriyas, but the most abominable sons of ksatriyas.

With pitiable prayers, Renuka, the mother of Parasurama and wife of Jamadagni, begged for the life of her husband. But the sons of Kartaviryarjuna, being devoid of the qualities of ksatriyas, were so cruel that despite her prayers they forcibly cut off his head and took it away.