[Abu 'Eisa said:] There are narrations on this topic from Ibn 'Umar, Umm Habibah, and Umm Salamah. This Hadith is Hasan Sahih.
In-book : Book 23, Hadith 34
English translation : Vol. 3, Book 21, Hadith 1703
23. The Book on Jihad
باب مَا جَاءَ أَنَّهُ يُبْدَأُ بِمُؤَخَّرِ الرَّأْسِ