Messenger of Allah (may peace'be upon him) observed once or twice:" May Allah have mercy upon those who get their heads shaved." And he also said:" Upon those too who got their hair clipped."  

حَلَقَ رَسُولُ اللَّهِ ﷺ وَحَلَقَ طَائِفَةٌ مِنْ أَصْحَابِهِ وَقَصَّرَ بَعْضُهُمْ قَالَ عَبْدُ اللَّهِ إِنَّ رَسُولَ اللَّهِ ﷺ قَالَ رَحِمَ اللَّهُ الْمُحَلِّقِينَ مَرَّةً أَوْ مَرَّتَيْنِ ثُمَّ قَالَ وَالْمُقَصِّرِينَ  

O Allah, have mercy upon those who get their heads shaved. They (the Companions) said: Messenger of Allah, (what about those) who have got their hair clipped? He said: O Allah, have mercy upon those who have got their heads shaved. They (again) said: Messenger of Allah, (what about those) who have got their hair clipped? Thereupon he said: (O Allah, have mercy upon those) who have got their hair clipped.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ اللَّهُمَّ ارْحَمِ الْمُحَلِّقِينَ قَالُوا وَالْمُقَصِّرِينَ يَا رَسُولَ اللَّهِ قَالَ اللَّهُمَّ ارْحَمِ الْمُحَلِّقِينَ قَالُوا وَالْمُقَصِّرِينَ يَا رَسُولَ اللَّهِ قَالَ وَالْمُقَصِّرِينَ  

May Allah have mercy upon those who have got their heads shaved. They said: Messenger of Allah, (what about) those who got their hair clipped? He said: May Allah have mercy upon those who have got their heads shaved. They said: Messenger of Allah, (what about those who have got their hair clipped)? He said: May Allah have mercy upon those who got their hair shaved. They said: Messenger of Allah, (what about) those who got their hair clipped? He said: (O Allah, have mercy upon) those who got their hair clipped.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ رَحِمَ اللَّهُ الْمُحَلِّقِينَ قَالُوا وَالْمُقَصِّرِينَ يَا رَسُولَ اللَّهِ قَالَ رَحِمَ اللَّهُ الْمُحَلِّقِينَ قَالُوا وَالْمُقَصِّرِينَ يَا رَسُولَ اللَّهِ قَالَ رَحِمَ اللَّهُ الْمُحَلِّقِينَ قَالُوا وَالْمُقَصِّرِينَ يَا رَسُولَ اللَّهِ قَالَ وَالْمُقَصِّرِينَ  

(May Allah have mercy upon) those who got their hair clipped."  

وَالْمُقَصِّرِينَ  

O Allah, grant pardon to those who got their heads shaved. They (Companions of the Holy Prophet) said: Messenger of Allah, (what about those) who get their hair cut? He said: O Allah, grant pardon to those who get their heads shaved. They said: Messenger of Allah, (what about those) who got their hair clipped? He said: O Allah, grant pardon to those who get their heads shaved. They said: Messenger of Allah, (what about those) who get their hair clipped? He said: (O Allah, grant pardon to) those who get their hair clipped.  

قَالَ رَسُولُ اللَّهِ ﷺ اللَّهُمَّ اغْفِرْ لِلْمُحَلِّقِينَ قَالُوا يَا رَسُولَ اللَّهِ وَلِلْمُقَصِّرِينَ قَالَ اللَّهُمَّ اغْفِرْ لِلْمُحَلِّقِينَ قَالُوا يَا رَسُولَ اللَّهِ وَلِلْمُقَصِّرِينَ قَالَ اللَّهُمَّ اغْفِرْ لِلْمُحَلِّقِينَ قَالُوا يَا رَسُولَ اللَّهِ وَلِلْمُقَصِّرِينَ قَالَ وَلِلْمُقَصِّرِينَ  

A hadith like this is narrated on the authority of Abu Huraira.  

عَنِ النَّبِيِّ ﷺ بِمَعْنَى حَدِيثِ أَبِي زُرْعَةَ عَنْ أَبِي هُرَيْرَةَ  

Yahya b. al-Husain reported on the authority of his grandfather that Allah's Apostle ﷺ invoked blessing on the occasion of the Farewell Pilgrimage three times for those who got their heads shaved and once for those who got their hair clipped. In the narration transmitted by Waki' there is no mention of the Farewell Pilgrimage.  

أَنَّهَا سَمِعَتِ النَّبِيَّ ﷺ فِي حَجَّةِ الْوَدَاعِ دَعَا لِلْمُحَلِّقِينَ ثَلاَثًا وَلِلْمُقَصِّرِينَ مَرَّةً وَلَمْ يَقُلْ وَكِيعٌ فِي حَجَّةِ الْوَدَاعِ  

Ibn Umar reported that Messenger of Allah ﷺ got his head shaved on the occasion of the Farewell Pilgrimage.  

أَنَّ رَسُولَ اللَّهِ ﷺ حَلَقَ رَأْسَهُ فِي حَجَّةِ الْوَدَاعِ