Salaah

Reciting Sami Allahu liman Hamidah instead of Subhana Rabiyal A'laa

Q: When performing Salaah behind the Imaam, in the sujud after saying a few times "subhana rabbiyal alaa" somehow I was about to say "sami Allahu liman hamidah" but as soon as i said "sami Al" I realisized and cutt off and continued saying "subhana rabbiyal alaa". Now was my prayed invalidated since I cutt of at the half? Must I repeat it?

Various Questions regarding Qadha for Missed Salaah

Q: Please could you explain the method of performing qadhaa salaah missed from the time of puberty, as well as clarify the following:

  1. Besides sunrise, zawaal and sunset, are there any times during which one cannot perform qadhaa salaah?
  2. Should qadhaa be performed before or after adhaa salaah?
  3. Is there a limit to the number of qadhaa salaah that can be performed at a time?
  4. Does qadhaa have to be performed in the sequence it was missed? If I have missed a salaah today, do I make up that salaah first, or do I continue making up my previous missed salaah?
  5. Any other information that you think will assist me in this regard?

Lowering the back for ruku' and sajdah when performing salaah while seated on a chair

Q:

  1. When performing salah sitting on a chair do you leave your back straight and just move your head little for ruku and more for sajdah as mentioned in the video by the mufti saheb or you should move the back as well, because that's what I have seen people even scholars pray who are unable to do ruku and sajdah and the in a normal manner? Link: ...
  2. If the mufti saheb in the video is correct how is it for a person who is unable to do sajdah on the ground to move the back when praying sitting on the chair or on the ground?