Mishkat al-Masabih, hadith 112

وَعَنْ أَبِي الدَّرْدَاءَ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «خَلَقَ اللَّهُ آدَمَ حِينَ خَلَقَهُ فَضَرَبَ كَتِفَهُ الْيُمْنَى فَأَخْرَجَ ذُرِّيَّةً بَيْضَاءَ كَأَنَّهُمُ الذَّرُّ وَضَرَبَ كَتِفَهُ الْيُسْرَى فَأَخْرَجَ ذُرِّيَّةً سَوْدَاءَ كَأَنَّهُمُ الْحُمَمُ فَقَالَ لِلَّذِي فِي يَمِينِهِ إِلَى الْجَنَّةِ وَلَا أُبَالِي وَقَالَ للَّذي فِي كَفه الْيُسْرَى إِلَى النَّارِ وَلَا أُبَالِي» . رَوَاهُ أَحْمَدُ

Abud Darda' reported God’s messenger as saying, “God created Adam when He created him and struck his right shoulder and brought forth his offspring white like small ants. And he struck his left shoulder and brought forth his offspring black as though they were charcoal. Then He said to the party on his right side, ‘To paradise, and I do not care’ and He said to the party in his left shoulder, ‘To hell, and I do not care’.” Ahmad transmitted it.