ENOfficial
Anas reported God's messenger as saying, "The best medical treatments you apply are cupping and sea costus.” (Bukhari and Muslim.)
Source: sunnah.com
Other translations
Arabic
وَعَنْ أَنَسٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِنَّ أَمْثَلَ مَا تَدَاوَيْتُمْ بِهِ الْحجامَة والقُسْط البحري»
sunnah.com