ON THE SUBJECT OF 226 VIRTUE OF FASTING THE FIRST TEN DAYS OF DHUL HIJA; FASTING DURING THE FIRST TEN DAYS OF DHUL HIJA H 1275 "There are no days during which a virtuous action is more pleasing to Allah than the first ten days of Dhul Hija. He was asked, 'O Messenger of Allah, praise and peace be upon him, not even striving in the Cause of Allah?' He answered, 'Not even striving in the Cause of Allah except in the case of one who goes forth with his life and his property and does not return with either.'" R 1275 Bukhari and Muslim with a chain up to ibn Abbas who related that the Messenger of Allah, praise and peace be upon him, said this.
باب فضل الصوم وغيره في العشر الأول من ذي الحجة 1249- وعن ابن عباس رضي الله عنهما ، قَالَ : قَالَ رسول الله صلى الله عليه وآله وسلم : "مَا مِنْ أيَّامٍ ، العَمَلُ الصَّالِحُ فِيهَا أحَبُّ إِلَى اللهِ مِنْ هذِهِ الأَيَّام" يعني أيام العشر . قالوا : يَا رسولَ اللهِ ، وَلاَ الجِهَادُ في سَبيلِ اللهِ ؟ قَالَ : "وَلاَ الجِهَادُ فِي سَبِيلِ اللهِ ، إِلاَّ رَجُلٌ خَرَجَ بِنَفْسِهِ وَمَالِهِ ، فَلَمْ يَرْجِعْ مِنْ ذَلِكَ بِشَيءٍ" رواه البخاري .