John Gill Commentary Deuteronomy 7:13

"and he will love thee, and bless thee, and multiply thee; he will also bless the fruit of thy body and the fruit of thy ground, thy grain and thy new wine and thine oil, the increase of thy cattle and the young of thy flock, in the land which he sware unto thy fathers to give thee." — Deuteronomy 7:13 (ASV)

And he will love thee
As he has done, and rest in his love, and give further instances and proofs of it:

and bless thee, and multiply thee ;
that is bless thee with a multiplication of offspring, which was what was often promised to Abraham, Isaac, and Jacob; that their seed should be as the stars of heaven, the dust of the earth, and the sand of the sea:

he will also bless the fruit of thy womb ;
not only give strength to conceive, but carry on the pregnancy, preserve the foetus, and prevent miscarrying:

and the fruit of thy land, thy corn, and thy wine, and thine oil ;
which were the principal produce of it:

the increase of thy kine, and the flocks of thy sheep :
their larger and lesser cattle, oxen and sheep: in the land which he sware unto thy fathers to give thee; the land of Canaan, given in promise, and that established by an oath.