Surah Al-Fatir (The Originator), Verse 18

وَلَا تَزِرُ وَازِرَةٌ وِّزْرَ اُخْرٰی وَاِنْ تَدْعُ مُثْقَلَةٌ اِلٰی حِمْلِهَا لَا یُحْمَلْ مِنْهُ شَیْءٌ وَّلَوْ كَانَ ذَا قُرْبٰی اِنَّمَا تُنْذِرُ الَّذِیْنَ یَخْشَوْنَ رَبَّهُمْ بِالْغَیْبِ وَاَقَامُوا الصَّلٰوةَ وَمَنْ تَزَكّٰی فَاِنَّمَا یَتَزَكّٰی لِنَفْسِهٖ وَاِلَی اللّٰهِ الْمَصِیْرُ ۟

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

“Nor can a bearer of burdens bear another's burden if one heavily laden should call another to (bear) his load. Not the least portion of it can be carried (by the other). Even though he be nearly related. Thou canst but admonish such as fear their Lord unseen and establish regular Prayer. And whoever purifies himself does so for the benefit of his own soul; and the destination (of all) is to Allah.”

Quran 35:18 (Yusuf Ali Translation)