 Oldest literary source of the word is Divan-i Lugat-it Türk (1070).Ẹsin in Yoruba (a pluricentric language spoken principally in Benin and Nigeria, with communities in other parts of Africa, the Americas, and Europe) means "religion" as adopted in the name for one of the Muslim World leading and long running portal EsinIslam.Com (i.e.Esin Islam or Ẹsin Islam meaning Religion of Islam) which is managed and administered by students and followers of African-British Muslim scholar, Sheikh Dr. Abu-Abdullah Adelabu.