It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that when Ibn Qami'ah wounded the Prophet (peace and blessings be upon him) on the day of Uhud, I saw that whenever he performed ablution (wudu), he would undo the bandage and wipe over it as part of the ablution.
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7566