No deed is better than the one done during the first ten days of Dhu al-Hijjah
The Prophet ﷺ said, "No good deeds done on other days are superior to those done on these (first ten days of Dhu al-Hijjah)." Then some companions of the Prophet ﷺ said, "Not even Jihad?" He replied, "Not even Jihad, except that of a man who does it by putting himself and his property in danger (for Allah's sake) and does not return with any of those things."
عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ: «مَا الْعَمَلُ فِي أَيَّامِ الْعَشْرِ أَفْضَلَ مِنَ الْعَمَلِ فِي هَذِهِ۔» [يعني: أَيامَ العشرِ] قَالُوا: وَلاَ الْجِهَادُ؟ قَالَ: «وَلاَ الْجِهَادُ إِلاَّ رَجُلٌ خَرَجَ يُخَاطِرُ بِنَفْسِهِ وَمَالِهِ فَلَمْ يَرْجِعْ بِشَىْءٍ۔»