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  • English_Boxer_Muhammad_Ali_Prayer_Book, page : 359

"Allahu Akbar," before proceeding with the prayer service. 253 This
is called "Takbirah Ihram," and it is one of the basics of prayer.

WHEN PRAYER BECOMES OBLIGATORY
Prayer is obligatory for every Muslim who is relatively mature
and at or beyond the age of puberty, provided he or she is sane
and in a normal state of mind. Children should be taught to pray
at the age of seven, and they should be urged to do so at the age of
ten.

OBLIGATORY ACTS OF WORSHIP
Once we begin an act of worship to Allah [including nonoblig-
atory prayers, the performance of Hajj or Umrah (journey to Mak-
kah for Hajj), etc.] we are obligated to complete it. The Holy
Qur'an says, "Fulfill the covenant of Allah when you have entered
into it, and break not your oaths after you have confirmed them;
indeed you have made Allah your surety; for Allah knows all that
you do."254
COMBINING PRAYERS