Columbia subject headings:
Asceticism--Islam.
God (Islam)--Worship and love.
Hadith.
Muslims--Conduct of life.
Religious life--Islam.
Spiritual life--Islam.
Harvard subject headings:
Asceticism--Islam.
God (Islam)--Worship and love.
Hadith
Muslims--Conduct of life
Religious life--Islam
Spiritual life--Islam
Princeton subject headings: