1 Samuel 28:18

Because thou obeyedst not the voice of the LORD, nor executedst his fierce wrath upon Amalek, therefore hath the LORD done this thing unto thee this day.

Because you didn't obey the voice of Yahweh, and didn't execute his fierce wrath on Amalek, therefore has Yahweh done this thing to you this day.

Because thou obeyedst not the voice of Jehovah, and didst not execute his fierce wrath upon Amalek, therefore hath Jehovah done this thing unto thee this day.

Because thou hast not hearkened to the voice of Jehovah, nor didst the fierceness of His anger on Amalek -- therefore this thing hath Jehovah done to thee this day;

Because you did not obey the LORD or carry out His burning anger against Amalek, the LORD has done this to you today.