No soul can carry the sins of another soul. If a soul that is loaded with sins implores another to bear part of its load, no other soul can carry any part of it, even if they were related. The only people to heed your warnings are those who reverence their Lord, even when alone in their privacy, and observe the Contact Prayers (Salat). Whoever purifies his soul, does so for his own good. To God is the final destiny.
وَلا تَزِرُ وازِرَةٌ وِزرَ أُخرىٰ وَإِن تَدعُ مُثقَلَةٌ إِلىٰ حِملِها لا يُحمَل مِنهُ شَىءٌ وَلَو كانَ ذا قُربىٰ إِنَّما تُنذِرُ الَّذينَ يَخشَونَ رَبَّهُم بِالغَيبِ وَأَقامُوا الصَّلوٰةَ وَمَن تَزَكّىٰ فَإِنَّما يَتَزَكّىٰ لِنَفسِهِ وَإِلَى اللَّهِ المَصيرُ
wa laa taziru waaziratun wizra ukhraa; wa in tad’u musqalatun ilaa himlihaa laa yuhmal minhu shai’unw wa law kaana zaa qurbaa; innamaa tunzirul lazeena yakhshawna Rabbahum bilghaibi wa aqaamus Salaah; wa man tazakkaa fa innamaa yatazakkaa linafsih; wa ilal laahil maseer