Hadithcore
Mishkat al-Masabih, 1460

Ibn ‘Abbas reported God's Messenger as saying, “There are no days in which a good deed is more pleasing to God than these ten days.” On being asked whether not even <i>jihad</i> in God’s path were as pleasing, he replied, “Not even <i>jihad</i> in God’s path, except when a man goes out in person with his property and loses both life and property.” Bukhari transmitted it.

وَعَنِ ابْنِ عَبَّاسٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَا مِنْ أَيَّامٍ الْعَمَلُ الصَّالِحُ فِيهِنَّ أَحَبُّ إِلَى اللَّهِ مِنْ هَذِهِ الْأَيَّامِ الْعَشَرَةِ» قَالُوا: يَا رَسُولَ اللَّهِ وَلَا الْجِهَادُ فِي سَبِيلِ اللَّهِ؟ قَالَ: «وَلَا الْجِهَادُ فِي سَبِيلِ اللَّهِ إِلَّا رَجُلٌ خَرَجَ بِنَفْسِهِ وَمَالِهِ فَلَمْ يَرْجِعْ مِنْ ذَلِكَ بِشَيْءٍ» . رَوَاهُ البُخَارِيّ

References1 variant
In-Book Reference
Book 4, Hadith 861