[Abu 'Eisa said:] This Hadith is Hasan Sahih. This is acted upon according to the people of knowledge. And the meaning of Ha' Wa Ha' is hand to hand.
In-book : Book 14, Hadith 43
English translation : Vol. 1, Book 12, Hadith 1243
14. The Book on Business
باب مَا جَاءَ فِي مَسْحِ الرَّأْسِ أَنَّهُ يَبْدَأُ بِمُقَدَّمِ الرَّأْسِ إِلَى مُؤَخَّرِهِ