The heart
leb (labe)
the heart; also used (figuratively) very widely for the feelings, the will and even the intellect
of the righteous
tsaddiyq (tsad-deek')
just -- just, lawful, righteous (man).
studieth
hagah (daw-gaw')
to murmur (in pleasure or anger); by implication, to ponder -- imagine, meditate, mourn, mutter, roar, sore, speak, study, talk, utter.
to answer
`anah (aw-naw')
to eye or (generally) to heed, i.e. pay attention; by implication, to respond; by extens. to begin to speak; specifically to sing, shout, testify, announce
but the mouth
peh (peh)
the mouth (as the means of blowing), whether literal or figurative (particularly speech); specifically edge, portion or side; adverbially (with preposition) according to
of the wicked
rasha` (raw-shaw')
morally wrong; concretely, an (actively) bad person -- + condemned, guilty, ungodly, wicked (man), that did wrong.
poureth
naba` (naw-bah')
to gush forth; figuratively, to utter (good or bad words); specifically, to emit (a foul odor) -- belch out, flowing, pour out, send forth, utter (abundantly).
out evil things
ra` (rah)
bad or (as noun) evil (natural or moral)one), worse(-st), wretchedness, wrong. (Incl. feminine raaah; as adjective or noun.).