SB 9.16.14

tad upaśrutya dūrasthā
 hā rāmety ārtavat svanam
tvarayāśramam āsādya
 dadṛśuḥ pitaraṁ hatam
Word for word: 
tat — that crying of Reṇukā; upaśrutya — upon hearing; dūra-sthāḥ — although staying a long distance away; rāma — O Rāma, O Rāma; iti — thus; ārta-vat — very aggrieved; svanam — the sound; tvarayā — very hastily; āśramam — to the residence of Jamadagni; āsādya — coming; dadṛśuḥ — saw; pitaram — the father; hatam — killed.
Translation: 
Although the sons of Jamadagni, including Lord Paraśurāma, were a long distance from home, as soon as they heard Reṇukā loudly calling “O Rāma, O my son,” they hastily returned to the āśrama, where they saw their father already killed.