مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ٢٢١ - QIYAM (TO STAND)

there happens to be a letter instead of Hamza which is silent (i.e. it does not have any stroke) even then those three letters should be read with prolongation. For example, as regards wa lazzal leen after Alif the letter lam is silent, its Alif should be read with prolongation. And if the person concerned does not act according to the rules mentioned above the obligatory precaution is that he should complete the prayers and should offer the same de novo.
١٠١٣. The obligatory precaution is that while offering prayers we should not resort to waqf ba harkat and wasl ba sukun. And the meaning of Waqf ba harkat is that we utter different strokes occurring at the end of a word and allow distance between that word and the succeeding word. For example while saying Ar Rahmanir Rahim we recite with stroke below Mim of Ar Rahim and thereafter allow a little distance and then say Malikiyaw Middin And the meaning of wasl ba sukun is that we do not utter the different strokes of a word and join that word with the succeeding Word. For example, while saying Ar Rahmanir Rahim we do not give stroke below Mim of Rahim and at once say Ma likiyaw middin.
١٠١٤. In the third and fourth units of prayers either only Surah al-Hamd be recited once, or instead of that Tasbihate Arbaah Subhanal ahi wal hamdu lillahi wa laillha illalahu wallahu Akbar may be said once, although it is better that it should be said thrice. It is also permissible for one who offers prayers to recite Surah al-Hamdin one unit and the above recital in the other, but it is better for one who offers prayers individually, to make the said recital in both the units. And when prayers isrequired to be offered loudly it is necessary (in the congregational prayers) for a mamum (follower), as a measure of necessary precaution, to resort to the recital of theTasbihat Arbaah.
١٠١٥. When time is short one should recite Tasbihate Arbaah once.