part was that the blessing would protect the one who received it, even to the point of causing any curse that was sent to come back on the one who sent it.

Gen. 12:3 And I will bless them that bless thee, and curse him that curseth thee: and in thee shall all families of the earth be blessed.

Prov 11:11 By the blessing of the upright the city is exalted: but it is overthrown by the mouth of the wicked.
Prov 18:21 Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof.
Words can either bless or curse
James 3:8-10
8But the tongue can no man tame; it is an unruly evil, full of deadly poison.
9Therewith bless we God, even the Father; and therewith curse we men, which are made after the similitude of God.
10Out of the same mouth proceedeth blessing and cursing. My brethren, these things ought not so to be.

Prov 26:27 Whoso diggeth a pit shall fall therein: and he that rolleth a stone, it will return upon him.
Balak the king of Moab hired baalim the prophet to curse the children of Israel, Baalim had it in his heart to do exactly that, but God would not allow it.
Num 23:11
11And Balak said unto Balaam, What hast thou done unto me? I took thee to curse mine enemies, and, behold, thou hast blessed them altogether.

Num 23:20 Behold, I have received commandment to bless: and he hath blessed; and I cannot reverse it.
TOO BLESSED: THE CURSE CANNOT REVERSE THE BLESSING, BUT THE BLESSING CAN REVERSE THE CURSE
Deut 23:5
5Nevertheless the LORD thy God would not hearken unto Balaam; but the LORD thy God turned the curse into a blessing unto thee, because the LORD thy God loved thee.
The Lord thy God loves thee today my friend and if you’ll take him at his word, he will turn your circumstances around, (You are too blessed to be cursed). rise up right now in Jesus name