Need help finding an episode

Hey everyone, im looking for a specific voice line. Im wondering if anyone here can help me narrow down my search. Im looking for someone saying they "need more power"/"im still not strong enough" something along those lines. Im not too familiar with the series, so without scrubbing through every episode im not sure where to start looking. Any help is appreciated, whether is a specific episode, or theres a fight around 150 where Goku might have said that.