SB 8.13.5
kasyapo ’trir vasisthas ca
visvamitro ’tha gautamah
jamadagnir bharadvaja
iti saptarsayah smrtah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Kasyapa, Atri, Vasistha, Visvamitra, Gautama, Jamadagni and Bharadvaja are known as the seven sages.