"Nothing could change the qadar except du`a’." (musnad ahmad, vol. 5, hadith no. 277; sunan at-tirmidhi, vol. 3, hadith no. 139; Allah blots out what he wills and confirms (what he wills). And with him is the mother of the book (al-lauh al-mahfûz) (ra'd 13:39) This ayah is evidence for that your destiny can be changed by dua. I tookthis from here. Allahu alam