Aslim Taslam (Arabic: أسلم تسلم) is a phrase meaning "submit (to God i.e. by accepting Islam) and you will get salvation", taken from the letters sent by the Islamic Prophet Muhammad to various kings and rulers in which he urged them to convert to Islam.
Letters of Muhammad, according to the usually told Islamic historiography, sent ambassadors with such letters to Heraclius the emperor of Eastern Roman Empire, Chosroes II the emperor of Persia, the Negus of Ethiopia, Muqawqis the ruler of Egypt, Harith Gassani the governor of Syria and Munzir ibn Sawa the ruler of Bahrain. The account as transmitted by Muslim historians reads as follows.
Narrated By 'Abdullah bin Umar : Allah's Apostle (p.b.u.h) said, "Anyone of you attending the Friday (prayers) should take a bath."
Narrated By Abu Said Al-Khudri : Allah's Apostle (p.b.u.h) said, "The taking of a bath on Friday is compulsory for every male (Muslim) who has attained the age of puberty."