After citing some Hadith, the phrase "Rawahu Al-Shaykhan (Related by the two Shaykhs)" comes at the end; who are the two Shaykhs?
The phrase "Rawahu Al-Shaykhan" refers to
Muhammad ibn Isma‘il Al-Bukhari, who compiled the most authentic collection of Hadith entitled [Sahih
Muslim ibn Al-Hajjaj Al-Naysabury, who compiled [Sahih Muslim], the most authentic book of Hadith after that of Al-Bukhari.
May Allah grant us success. May peace and blessings be upon our Prophet
Muhammad, his family, and Companions.