ANSWER:

The hadith is authentic which talks about the 2 sunnah rakahs of fajr, which Prophet salla allahu alaihi wa sallam said that they’re better than the whole world and all that it contains. 

I remember about a Hadith regarding Prophet (PBUH) saying that the one who does the 2 units of salah in the morning is the richest person on earth. I don’t remember the exact wordings.

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