Verse 37

याः फलावलयो येन संप्राप्ताः सिद्धिनामिकाः ।तास्तेनाधिगता राम निजात्प्रयतनद्रुमात्

In plain words

Whatever garlands of fruit, called siddhis, anyone has ever gained -- these, Rāma, he has won from the very tree of his own effort.