books the numerical forty in each hadith is a number
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# Forty newly
# numerical methods
# Numerical values
# numerical systems
# Numerical sequences
# Numerical sermons
# numerical aperture
# Numerical miracles in the Holy Quran
# arithmetic progression
# Forty hadiths on the merits of there is no god but God
# Forty Hadiths of Equality
# Numerical Strings
# Ethics from the Forty Hadiths
# Forty Hadiths on Fear and Hope
# Forty Hadiths on the Virtues of Charity
# Numerical methods and numerical analysis
# Numerical and geometric progressions
# Numerical functions
# In other numerical systems
# Numerical determinants
