Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) says concerning the words of Allah, "And spend in the path of Allah" [Surah al-Baqarah: 195]: Let no one ever say that he has nothing to give in the path of Allah; if he has only a spear, let him prepare (for jihad) with it. "And do not throw yourselves with your own hands into destruction" [Surah al-Baqarah: 195].
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 17924