Amr bin Salamah narrates that he heard Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) saying: "To equip (someone with) a whip in the path of Allah (for jihad) is dearer to me than performing a (voluntary) Hajj after the obligatory Hajj."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9126