Hadithcore
Mishkat al-Masabih, 4541

She said that God’s messenger never had a wound or a bleeding foot* without ordering her to put henna on it. Tirmidhi transmitted it. * <i>Nakba</i> is used. It means an injury to the foot caused by a stone which produce bleeding.

وعنها قَالَت: مَا كَانَ يَكُونَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قُرْحَةٌ وَلَا نَكْبَةٌ إِلَّا أَمَرَنِي أَنْ أَضَعَ عَلَيْهَا الْحِنَّاء. رَوَاهُ التِّرْمِذِيّ

References1 variant
In-Book Reference
Book 23, Hadith 28