عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((مَا مِنْ أَيَّامٍ الْعَمَلُ الصَّالِحُ فِيهَا أَحَبُّ إِلَى اللَّهِ عَزَّ وَجَلَّ مِنْ هَٰذِهِ الْأَيَّامِ يَعْنِي أَيَّامَ الْعَشْرِ))، قَالَ: قَالُوا: يَا رَسُولَ اللَّهِ! وَلَا الْجِهَادُ فِي سَبِيلِ اللَّهِ؟ قَالَ: ((وَلَا الْجِهَادُ فِي سَبِيلِ اللَّهِ إِلَّا رَجُلٌ خَرَجَ بِنَفْسِهِ وَمَالِهِ، ثُمَّ لَمْ يَرْجِعْ مِنْ ذَلِكَ بِشَيْءٍ))
It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: There are no days in which righteous deeds are more beloved to Allah than these first ten days (of Dhul-Hijjah). The Companions (may Allah be pleased with them) said: O Messenger of Allah! Not even striving (jihad) in the way of Allah (in other days)? He (peace and blessings be upon him) said: Not even striving in the way of Allah, except for a man who goes out with his life and wealth and returns with none of them.