The meaning of tune is verse 37, Surat Fatiya

There they will cry out, 'Our Lord, take us out, we will do the right thing, I will not do anything I used to do before.' '(Allah will say) did I not give you so many years that you could have thought of that? Moreover, there came to you a warner and a messenger. So taste it. There is no helper for the wrongdoers

(Surah Fatir,Verse 37)