Quran 5:31

فَبَعَثَ ٱللَّهُ غُرَابً۬ا يَبۡحَثُ فِى ٱلۡأَرۡضِ لِيُرِيَهُ ۥ كَيۡفَ يُوَٲرِى سَوۡءَةَ أَخِيهِ‌ۚ قَالَ يَـٰوَيۡلَتَىٰٓ أَعَجَزۡتُ أَنۡ أَكُونَ مِثۡلَ هَـٰذَا ٱلۡغُرَابِ فَأُوَٲرِىَ سَوۡءَةَ أَخِى‌ۖ فَأَصۡبَحَ مِنَ ٱلنَّـٰدِمِينَ ٣١

ALLAH then sent a raven to scratch the soil, to teach him how to bury his brother’s corpse. He said, "Woe to me; I failed to be as intelligent as this raven, and bury my brother’s corpse." He became ridden with remorse.