Hadith 5:701
Ibn ‘Uyaynah narrated to us, from Zayd ibn Aslam, from his father, who said: ‘Umar gave a horse to be used in the way of Allah, then he saw it, or some of its equipment, being sold in the market. He wanted to buy it, so he asked the Prophet, peace and blessings of Allah be upon him. He said: "Do not, until it meets you on the Day of Resurrection."
حدثنا بن عيينة عن زيد بن أسلم عن أبيه قال حمل عمر على فرس في سبيل الله فراه أو شيئا من ثيابه تباع في السوق فأراد أن يشتريه فسأل النبي صلى الله عليه وسلم فقال لا حتى توافيك يوم القيامة