NET

16 For this reason it is by faith so that it may be by grace, with the result that the promise may be certain to all the descendants—not only to those who are under the law, but also to those who have the faith of Abraham, who is the father of us all

Darby

16 Therefore [it is] on the principle of faith, that [it might be] according to grace, in order to the promise being sure to all the seed, not to that only which [is] of the law, but to that also which [is] of Abraham's faith, who is father of us all,

KJV

16 Therefore [it is] of faith, that [it might be] by grace; to the end the promise might be sure to all the seed; not to that only which is of the law, but to that also which is of the faith of Abraham; who is the father of us all,

Strong's

16 Therefore ^{G1223 G5124} it is] is of^G1537 faith^G4102, that^G2443 it might might be by^G2596 grace^G5485; to the end^G1519 the promise^G1860 might be^G1511 sure^G949 to all^G3956 the seed^G4690; not^G3756 to that only^G3440 which is of^G1537 the law^G3551, but^G235 to that also^G2532 which is of^G1537 the faith^G4102 of Abraham^G11; who^G3739 is^G2076 the father^G3962 of us^G2257 all^G3956,