Mishkat al-Masabih
Book 30, Hadith 129
Arabic hadith text
وَعَنْ سَعْدِ بْنِ أَبِي وَقَّاصٍ قَالَ: إِنِّي لَأَوَّلُ الْعَرَبِ رَمَى بِسَهْمٍ فِي سَبِيل الله. مُتَّفق عَلَيْهِ
Translation
Sa'd b. Abu Waqqas said he was the first Arab to shoot an arrow in God's path. (Bukhari and Muslim.)