-----
Ibn ‘Abbās (radiyallāhu ‘anhumā) narrated that Allah’s Messenger (wassalallāhu ‘alaihi allam) said:
مَا مِنْ أَيَّامٍ الْعَمَلُ الصَّالِحُ فِيهَا أَحَبُّ إِلَى
اللَّهِ مِنْ هَذِهِ الأَيَّامِ ” . يَعْنِي أَيَّامَ الْعَشْرِ . قَالُوا يَا
رَسُولَ اللَّهِ وَلاَ الْجِهَادُ فِي سَبِيلِ اللَّهِ قَالَ ” وَلاَ الْجِهَادُ
فِي سَبِيلِ اللَّهِ إِلاَّ رَجُلٌ خَرَجَ بِنَفْسِهِ وَمَالِهِ فَلَمْ يَرْجِعْ
مِنْ ذَلِكَ بِشَىْءٍ
“There are no days during which righteous deeds are more beloved
to Allah than these ten,” meaning the ten of Dhul-Hijjah. They said: “O
Messenger of Allah, not even Jihād in Allah’s cause?” He replied: “Not
even Jihād in Allah’s cause, except for the man who left out with life and his
wealth and does not return back.” (Abu Dawud, no. 2438 and
graded saheeh by Al-Albāni)
Source: https://abukhadeejah.com/first-10-days-of-dhul-hijjah-the-days-of-eid-the-sacrifice-best-days-of-the-world/
More to read: https://www.wrightstreetmosque.com/the-first-ten-days-of-dhul-hijjah-and-understanding-their-great-virtues/