[Machine] Gabriel ﷺ said to the Prophet ﷺ , "What is faith?" He (the Prophet) said, "Faith is to believe in Allah, His angels, His books, His messengers, the Last Day, and to believe in divine predestination, its good and its bad." Gabriel then said to him, "You have spoken the truth." We were astonished that he was questioning him and then confirming his answers. The Prophet ﷺ said, "That was Gabriel who came to teach you your religion."  

أَنَّ جِبْرِيلَ عَلَيْهِ السَّلامُ قَالَ لِلنَّبِيِّ ﷺ مَا الْإِيمَانُ؟ قَالَ أَنْ تُؤْمِنَ بِاللهِ وَمَلائِكَتِهِ وَكُتُبِهِ وَرُسُلِهِ وَالْيَوْمِ الْآخِرِ وَبِالْقَدَرِ خَيْرِهِ وَشَرِّهِ فَقَالَ لَهُ جِبْرِيلُ صَدَقْتَ قَالَ فَتَعَجَّبْنَا مِنْهُ يَسْأَلُهُ وَيُصَدِّقُهُ قَالَ فَقَالَ النَّبِيُّ ﷺ ذَاكَ جِبْرِيلُ أَتَاكُمْ يُعَلِّمُكُمْ مَعَالِمَ دِينِكُمْ