It is narrated from Sayyiduna Abu Musa al-Ash'ari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "On the day Allah, exalted be His remembrance, created Adam (peace be upon him), He took two handfuls from his back; every pure (righteous) soul fell into His right hand and every impure (wicked) soul into the other hand. Then He said: 'These are the people of the right, and I do not care; these are the people of Paradise, and these are the people of Hell.' Then Allah Almighty returned them into the back of Adam (peace be upon him), and so they continue to be born (generation after generation) in that state until now."
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is not narrated from Abu Musa (may Allah be pleased with him) except with this chain, and Rawh bin al-Musayyib is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الهاء / 9375
Hadith Takhrij«أخرجه البزار فى «مسنده» برقم: 3032»