Al-Kāfi - Volume 2 > How They Answered While They Were as Small Particles
Hadith #1

1ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ بَعْضِ أَصْحَابِنَا عَنْ أَبِي بَصِيرٍ قَالَ قُلْتُ لأبِي عَبْدِ الله (عَلَيهِ السَّلام) كَيْفَ أَجَابُوا وَهُمْ ذَرٌّ قَالَ جَعَلَ فِيهِمْ مَا إِذَا سَأَلَهُمْ أَجَابُوهُ يَعْنِي فِي الْمِيثَاقِ.

1. Ali ibn Ibrahim has narrated from his father from ibn abu ‘Umayr from certain persons of our people from abu Basir who has said the following: “Once I asked abu ‘Abd Allah (a.s.) ‘How did they answer when they (offspring of Adam) were small particles?’ The Imam said, ‘Allah placed in them the ability to answer Him when He questioned them at the time of establishing a covenant with them.’”