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 jihad in God’s path were as pleasing, he replied, “Not even jihad in God’s path, except when a man goes out in person with his property and loses both life and property.” Bukhari transmitted it.
Source: sunnah.com
Other translations
Arabic
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
sunnah.com