A man from the Ansar said on the authority of Ka'b ibn Ujrah that he was feeling pain in his head (due to lice); so he shaved his head. The Prophet ﷺ ordered him to sacrifice a cow as offering.
أَخْبَرَهُ عَنْ كَعْبِ بْنِ عُجْرَةَ وَكَانَ قَدْ أَصَابَهُ فِي رَأْسِهِ أَذًى فَحَلَقَ فَأَمَرَهُ النَّبِيُّ ﷺ أَنْ يُهْدِيَ هَدْيًا بَقَرَةً