One verse

Srimad Bhagavatam 9.16.6

9.16.6

राम: सञ्चोदित: पित्रा भ्रातृन् मात्रा सहावधीत् । प्रभावज्ञो मुने: सम्यक् समाधेस्तपसश्च स: ॥ ६ ॥

ramah sancoditah pitra bhratrn matra sahavadhit prabhava-jno muneh samyak samadhes tapasas ca sah

ramah
Lord Parasurama
sancoditah
being encouraged (to kill his mother and brothers)
pitra
by his father
bhratrn
all his brothers
matra saha
with the mother
avadhit
killed immediately
prabhava-jnah
aware of the prowess
muneh
of the great sage
samyak
completely
samadheh
by meditation
tapasah
by austerity
ca
also
sah
he.

Jamadagni then ordered his youngest son, Parasurama, to kill his brothers, who had disobeyed this order, and his mother, who had mentally committed adultery. Lord Parasurama, knowing the power of his father, who was practiced in meditation and austerity, killed his mother and brothers immediately.