Hadith on Jihad: The Prophet would strive hard in worship during the last ten nights of Ramadan

Aisha reported: The Prophet, peace be upon him, would exert himself in worship during the last ten nights more than at any other time.

[Sahih Muslim, Book 6, Number 2644]

عَائِشَةُ رَضِيَ اللَّهُ عَنْهَا كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَجْتَهِدُ فِي الْعَشْرِ الْأَوَاخِرِ مَا لَا يَجْتَهِدُ فِي غَيْرِهِ

صحيح مسلم كِتَاب الِاعْتِكَافِ إذا دخل العشر أحيا الليل وأيقظ أهله وجد وشد المئزر