The Quran

مَنِ اهتَدىٰ فَإِنَّما يَهتَدي لِنَفسِهِ ۖ وَمَن ضَلَّ فَإِنَّما يَضِلُّ عَلَيها ۚ وَلا تَزِرُ وازِرَةٌ وِزرَ أُخرىٰ ۗ وَما كُنّا مُعَذِّبينَ حَتّىٰ نَبعَثَ رَسولًا

Muhammad Asad

Whoever chooses to follow the right path, follows it but for his own good; and whoever goes astray goes but astray to his own hurt; and no bearer of burdens shall be made to bear another's burden.¹ Moreover. We would never chastise [any community for the wrong they may do] ere We have sent an apostle [to them].²

See 6:164, 35:18 and 39:7, as well as the corresponding notes; also 53:38, which represents the earliest Qur'anic statement of this fundamental principle of ethics.
Sc., "so that they might fully understand the meaning of right and wrong": cf. 6:131-132 and the corresponding note 117, as well as 29:59 (which, in the chronology of revelation, immediately precedes the present surah).