Columbia subject headings:
God (Islam)--Worship and love--Early works to 1800.
Hadith--Early works to 1800.
Prayer--Islam--Early works to 1800.
Harvard subject headings:
God (Islam)--Worship and love--Early works to 1800.
Hadith--Early works to 1800
Prayer in the Hadith.
Prayer--Islam--Early works to 1800.
Princeton subject headings:
God (Islam)--Worship and love--Early works to 1800.
Hadith--Early works to 1800.
Prayer--Islam--Early works to 1800.