Bulugh al-Maram 1 The Book of Purification كتاب الطهارة 157

وَفِي رِوَايَةٍ لِلْبُخَارِيِّ: وَضَرَبَ بِكَفَّيْهِ اَلْأَرْضَ, وَنَفَخَ فِيهِمَا, ثُمَّ مَسَحَ بِهِمَا وَجْهَهُ وَكَفَّيْه ِ 1 . 1 – البخاري رقم (338).

In a version by Al-Bukhari, `Ammar said: ‘He (صلى الله عليه وسلم) struck the earth with the palms of his hands, blew in them and wiped his face and hands with them.