can we ask dua in our Fardh prayers in Sujudh...?

[*charisma*]

I have read in many books that we can ask dua in the Sujudh while praying... my question is can we ask dua on our Fajr prayers in Sujudh...? or should we pray sunnath salath to ask dua on our sujudh? pls answer with proof on Quran or hadeeth


:statisfie:statisfie:statisfie