What episode does goku throw the spirit bomb at freiza?

Goku throws the Spirit Bomb at Frieza in the "Dragon Ball Z" episode titled "Frieza's Boast," which is Episode 87 in the original Japanese version. This moment occurs during the climactic battle on Planet Namek, where Goku gathers energy from living beings to form the Spirit Bomb in an effort to defeat Frieza. The attack serves as a pivotal moment in their intense confrontation.