Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 14
Sanskrit:
तदुपश्रुत्य दूरस्था हा रामेत्यार्तवत्स्वनम् ।त्वरयाश्रममासाद्य ददृशु: पितरं हतम् ॥ १४ ॥
ITRANS:
tad upaśrutya dūrasthāhā rāmety ārtavat svanamtvarayāśramam āsādyadadṛśuḥ pitaraṁ hatam
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.