Sayyidina Ibn Abbas (RA) reported that Allah’s Messenger (SAW) said, ‘None of the days when good deeds are done are dearer to Allah than during these ten days”. They asked, 0 Messenger of Allah! Not even jihad in Allah’s cause?” So, he said, “Not even jihad in Allah’s cause except that a man goes out with his body and wealth and does not return with anyting”.
[Ahmed1968, Bukhari 795, Abu Dawud 2438, Ibn e Majah 1727]