It is narrated from Ibn Shihab that when the time of death drew near for Sa'd bin Abi Waqqas (may Allah be pleased with him), he called for an old woollen cloak and said: "Shroud me in it, for I faced the polytheists in it on the day of Badr, and I was only keeping it hidden for this very occasion."
Hadith Referenceالمعجم الكبير للطبراني / العشرة / 314