Liaison office of Grand Ayatullah Sayyid Ali Al Sistani (L.M.H.L) in London, Europe, North and South America.
1168. It is haraam, as an obligatory precaution, to break obligatory
prayers purposely. But if one has to break in order to protect property, or to
escape from financial or physical harm, there is no objection. In fact, he can
break it for any worldly or religious purpose which is crucially important for
him.
1169. If it is not possible for a person to protect, without breaking
the prayers, his own life, or the life of a person whose protection is
obligatory upon him, or to protect a property the protection of which is
obligatory on him, he should break the prayers.
1170. If a creditor demands payment from a person who is praying, and
if there is ample time for namaz, he should pay him while praying, if that is
possible. But if it is not possible to pay him without breaking the namaz, then
he should break the namaz, pay the creditor and then pray.
1171. If a person learns during his prayers that the mosque is najis,
and if time is short, he should complete the prayers. And if there is sufficient
time, and making the mosque Pak does not change the form of prayers, he should
make it Pak while praying, and then continue with the remaining part of the
prayers.
And if making the mosque Pak in that state changes the form of the
prayers, breaking of prayers is permissible if making it Pak is possible after
prayers; but if it is not possible, he should break the prayers, make the mosque
Pak, and then offer prayers.
1172. In a situation where one must break namaz, if he goes on and
completes it, his namaz is in order, though he will have committed a sin.
However, the recommended precaution is that he should offer the namaz again.
1173. If a person offering prayers remembers before Qir'at, or before
going to Ruku, that he has forgotten to say Adhan and Iqamah, and if he has
sufficient time at his disposal, it is Mustahab that he should break the prayers
and recite Adhan and Iqamah. In fact, if he remembers having missed them out
before ending the namaz, if is Mustahab to break the namaz and pronounce them.