وَعَنْ سَلْمَى خَادِمَةِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَتْ: مَا كَانَ أَحَدٌ يَشْتَكِي إِلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَجَعًا فِي رَأْسِهِ إِلَّا قَالَ: «احْتَجِمْ» وَلَا وَجَعًا فِي رِجْلَيْهِ إِلَّا قَالَ: «اخْتَضِبْهُمَا» . رَوَاهُ أَبُو دَاوُد

Salma, the Prophet’s woman-servant, told that no one complained to God’s messenger of a headache without his telling him to get cupped, or of a pain in his legs without his telling him to dye them with henna. Abu Dawud transmitted it.