It is permissible to carry a child during prayer. Try to minimize your movement! Raising the hands is a sunnah but it is not mandatory.

How can one pray salah holding a 4 month old baby- can I hold him with both hands while standing or does one hand has to be on chest? -do I put him on the floor first, do the opening takbeer then pick him up as both hands needs to be raised up -when reading tashahhud can I still carry him with both hands?

Prayer | November 16, 2015 8:41 pm
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While praying in jam’aa once, while rising from ruku, i accidentally started to say ‘sami Allahu liman hamidah’. I said ‘sam’, then I remembered, stopped saying that and said rabbana wa lakal hamd. Do things like this affect the prayer?
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I have read in one of the books that our prophet (saw)end his prayer by saying takbeer(AllahuAkbar) and Then saying astaghfirullah three times..but I couldn’t see that in ur fatwas..is that authentic??