ANSWER:

There’s no reward for doing something of the ibadah to show off, in fact he will be sinful for that act. 

Allah says “So whoever does an atom’s weight of good will see it” (Qur’an 99:7) And from some hadith we know that every good deed will have AT LEAST 10 times of rewards. BUT, does this include the good that people do for showing off? Meaning, will there be rewards but not as much as when people do something in secret and/or for pleasing Allah?