The writer assumes that the reader knows the history of how David became the chosen king. (See: [[rc://en/ta/man/translate/figs-explicit]])

## My hand will support him; my arm will strengthen him. ##

"Hand" and "arm" both means the power and control of Yahweh. (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-parallelism]])

## son of wickedness ##

The writer refers to those who have the nature or character of wickedness as "sons of wickedness." (See: [[rc://en/ta/man/translate/figs-metonymy]])