The mountains
har (har)
a mountain or range of hills (sometimes used figuratively) -- hill (country), mount(-ain), promotion.
shall bring
nasa' (naw-saw')
to lift, in a great variety of applications, literal and figurative, absol. and rel. (as follows)
peace
shalowm (shaw-lome')
safe, i.e. (figuratively) well, happy, friendly; also (abstractly) welfare, i.e. health, prosperity, peace
to the people
`am (am)
a people (as a congregated unit); specifically, a tribe (as those of Israel); hence (collectively) troops or attendants; figuratively, a flock -- folk, men, nation, people.
and the little hills
gib`ah (ghib-aw')
a hillock -- hill, little hill.
by righteousness
tsdaqah (tsed-aw-kaw')
rightness (abstractly), subjectively (rectitude), objectively (justice), morally (virtue) or figuratively (prosperity) -- justice, moderately, right(-eous) (act, -ly, -ness).