Abdullah bin Abbas reported,

The Prophet ﷺ said, "There are no days in which righteous deeds are more beloved to Allah than these days," meaning the first ten days of Dhul-Hijjah.The companions asked, "Messenger of Allah, not even jihad in the way of Allah?"He replied, "Not even jihad in the way of Allah, except for a man who goes out with his life and his wealth and comes back with none of it."

حدثنا أبو معاوية حدثنا الأعمش عن أبي صالح قال وحدثنا الأعمش عن مجاهد ليس فيه عن ابن عباس عن النبي ﷺ مثله يعني ما من أيام العمل فيها