Dought & clear, - He forgot and said Allaahu akbar instead of Sami’aAllaahu liman hamidah.

A man said Allaahu akbar instead of Sami'a Allaahu liman hamidah when
standing up after bowing. What should he do?.
Praise be to Allaah.
Saying Sami'a Allaahu liman hamidah, for both the imam and the one who
is praying alone, is one of the obligatory parts of prayer, according
to the correct opinion, as was stated in the answer to question no.
43574.
The one who forgets to say that and does not say anything, or says
Allaahu akbar instead of that, and remembers whilst he is still
praying, should do the two prostrations of forgetfulness before saying
the salaam.
The basic principle is that the one who forgets an obligatory part of
prayer or says a prescribed phrase – such as Allaahu akbar – in the
wrong place, should do the prostration of forgetfulness.
It says inDaleel al-Taalib: The prostration of forgetfulness is
required if one adds a bow or prostration or standing or sitting, even
if it is as long as the sitting between the two prostrations, or he
says the salaam before completing the prayer, or he makes a mistake in
recitation that alters the meaning, or he omits an obligatory part.
And Allaah knows best.