The Messenger of Allah ﷺ as saying: There is no virtue more to the liking of Allah in any day than in these days, that is, the first ten days of Dhu al-Hijjah. They (the Companions) asked: Messenger of Allah, not even the struggle in the path of Allah (Jihad) ? He said: (Yes), not even the struggle in the path of Allah, except a man who goes out (in the path of Allah) with his life and property, and does not return with any of them. (Using translation from Abū Dāʾūd 2438)
قَالَ رَسُولُ اللهِ ﷺ مَا مِنْ أَيَّامٍ الْعَمَلُ الصَّالِحُ فِيهَا أَحَبُّ إِلَى اللهِ ﷻ مِنْ هَذِهِ الْأَيَّامِ يَعْنِي أَيَّامَ الْعَشْرِ قَالَ قَالُوا يَا رَسُولَ اللهِ وَلا الْجِهَادُ فِي سَبِيلِ اللهِ؟ قَالَ وَلا الْجِهَادُ فِي سَبِيلِ اللهِ إِلا رَجُلًا خَرَجَ بِنَفْسِهِ وَمَالِهِ ثُمَّ لَمْ يَرْجِعْ مِنْ ذَلِكَ بِشَيْءٍ