Deuteronomy 7:15

Overview - Deuteronomy 7
All communion with the nations is forbidden;
for fear of idolatry;
for the holiness of the people;
for the nature of God in his mercy and justice;
17 for the assuredness of victory which God will give over them.
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Deuteronomy 7:15  (King James Version)
And the LORD will take away from thee all sickness, and will put none of the evil diseases of Egypt, which thou knowest, upon thee; but will lay them upon all them that hate thee.

will put none
The Israelites, if obedient, would have been subject to no maladies but those common to fallen man, and generally very healthy and long lived; being exempted from pestilential diseases, which have often most tremendously scourged guilty nations; and from such maladies in particular, as they had witnessed in Egypt, by which God afflicted their cruel oppressors, ( Exodus 15:26 .) This must be referred to the national covenant; for though godliness often secures the most solid temporal advantages, yet temporal blessings were not, even among them, uniformly dispensed to individuals according to their obedience; but they were to the nation, with an exactness which is not observed towards any other people.
Leviticus 26:3 Leviticus 26:4

will put none
Deuteronomy 28:27 Deuteronomy 28:60 Exodus 9:11 ; 15:26 Psalms 105:36 Psalms 105:37