[Abu 'Eisa said:] There are narrations on this topic from Abu Hurairah, Jabir, Anas, and 'Aishah. This Hadith is Hasan Sahih Gharib as a narration of Ath-Thawri.
In-book : Book 23, Hadith 30
English translation : Vol. 3, Book 21, Hadith 1699
23. The Book on Jihad
باب الْمَضْمَضَةِ وَالاِسْتِنْشَاقِ مِنْ كَفٍّ وَاحِدٍ