I think I forgot to perform sajdah when reading specific parts of the verses after reading the Quran. What happens if you don't perform the sajdah? Can a person still perform sajdah at any time to make up for it?
When you are in doubt and think you may have made a mistake, you can make two sajdas at the end of the prayer (before or after saying the final salam). This is known as sajdat al-sahu. This is not obligatory according to some scholars, which is the opinion I prefer, so even if you do not do it your prayer is still valid. If some time has passed since you prayed, you can still perform these sajdas when you remember.
And God knows best.
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