عَنْ أَبِي ذَرٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ: لَقَدْ تَرَكَنَا مُحَمَّدٌ وَمَا يُحَرِّكُ طَائِرٌ جَنَاحَيْهِ فِي السَّمَاءِ إِلَّا أَذْكَرَنَا مِنْهُ عِلْمًا
It is narrated from Sayyiduna Abu Dharr (may Allah be pleased with him), he says: "Muhammad (peace and blessings be upon him) left us in such a state that even if a bird moved its wings (to fly), we would gain some knowledge from it."