## I will give pure lips to the people ##

This is another way of saying that God will cause his people to speak what is right.  (See: [[rc://en/ta/man/translate/figs-metonymy]])

## serve me standing shoulder to shoulder ##

The people will be united in their desire to serve God, as people are united physically when they stand together with their shoulders touching each other.  (See: [[rc://en/ta/man/translate/figs-idiom]])