Bulugh al-Maram
Book 7, Hadith 182
Arabic hadith text
{ وَأَمَّا خَالِدٌ فَقَدْ اِحْتَبَسَ أَدْرَاعَهُ وَأَعْتَادَهُ فِي سَبِيلِ اَللَّهِ } مُتَّفَقٌ عَلَيْه ِ 1 .1 - تقدم برقم (885).
Translation
"As for Khalid, he has kept back his coats of mail and weapons to use them in Allah's Cause."[Agreed upon].