NET
21 For the sake of your promise and according to your purpose you have done this great thing in order to reveal it to your servant.
Darby
21 For thy word's sake, and according to thine own heart, hast thou done all this greatness, to make thy servant know [it].
KJV
21 For thy word's sake, and according to thine own heart, hast thou done all these great things, to make thy servant know [them].