Bhagavatapurana 10.82.3

10.82.3

niḥkṣatriyāṃ mahīṃ kurvan rāmaḥ śastra-bhṛtāṃ varaḥ /
nṛpāṇāṃ rudhiraugheṇa yatra cakre mahā-hradān //

2. When they knew it all (good) people, O king, from all sides, went in advance to the holy place of Syamanta Panchaka in order to secure great religious merit. 3. And there Parasurama, who was exterminating the kshatriya race on the earth had caused great pools filled with the blood of kings.