भवता by you, धर्मफलम् merits earned through righteousness, प्राप्तं तावत् you reaped, अत्र here, संशयः no doubt, न not, अस्य of this, अधर्मस्य of unrighteousness, फलमपि result also, क्षिप्रमेव quickly, प्रपत्स्यसे reap

"There is no doubt you have earned merit through righteousness (dharma destroys adharma and yields sweet fruit ultimately). But now you will quickly reap the result of your unrighteousness also.