1 verse has
seventy
in Edition Clear Qur'an by Talal Itani / At-Tawba (The Repentance)

9:80Whether you ask forgiveness for them, or do not ask forgiveness for them—even if you ask forgiveness for them seventy times, God will not forgive them. That is because they disbelieved in God and His Messenger. God does not guide the immoral people.