Mishkat al-Masabih
Mishkat al-Masabih 1460
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
Unreviewed translation. All hadiths in this collection are available in five languages. Titles and introductions may remain in Arabic.
Ibn Abbas reported that the Messenger of God said: No days contain a good deed more beloved to God than these ten days. They asked: Not even striving in the path of God? He replied: Not even striving in the path of God, except for a man who goes out with his life and wealth and returns with nothing. Al-Bukhari transmitted it.
Notes and open questions — unreviewed
The ten days refers to the first ten days of Dhu al-Hijja.