مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ١٦٣ - (vi) Prayers which become obligatory on account of hire, vow or oath

absorbed in these thoughts while performing prayers he becomes unmindful and oblivious of his own self. For example, an arrow waspulled out of the foot of the Commander of the Faithful Imam Ali (peace be on him) while he was offering prayers but he did not become aware of it.
Furthermore, one who performs prayers should repent of ones shortcomings and should refrain from all sins and especially those which are an impediment in the way ofacceptance of ones prayers (e.g. envy, pride, backbiting, using unlawful things, drinking intoxicating beverages, non-payment of religious taxes (Khums and Zakat etc.).Similarly it is better not to perform acts which diminish the spiritual recompense of prayers (e.g. we should not begin offering prayers while we are drowsy or arecontrolling our urine, and while offering prayers we should not also look up towards the sky). On the contrary one should perform the acts which increase the spiritualrecompense (e.g. we should wear a ring containing agate (Aqiq) and also wear clean dress, comb our hair, brush our teeth and apply perfume).

OBLIGATORY PRAYERS
The following six prayers are obligatory: (i) Daily prayers. (ii) Signs prayers. (iii) Prayers for a dead body. (iv) Prayers for the obligatory Tawaf of the holy Kabah. (v)Lapsed prayers of father which are obligatory upon his eldest son.
(vi) Prayers which become obligatory on account of hire, vow or oath

OBLIGATORY DAILY PRAYERS
It is obligatory to perform the following five prayers during day and night: Midday (Zuhr) and afternoon prayers (Asr) - each one consisting of ٤ units (Rakat). Duskprayers (maghrib) - ٣ units. Night prayers (Isha) - ٤ units. Dawn prayers (Fajr) - ٢ units.
٧٣٦. While travelling the traveller should reduce the prayers