Strong's #3826: libbah (pronounced lib-baw')
feminine of 3820; the heart:--heart.
Brown-Driver-Briggs Hebrew Lexicon:
ּ
libbâh
1) heart
Part of Speech: noun feminine
Relation: from H3820
Usage:
This word is used 5 times:
Psalms 125:4: "O LORD, unto those that be good, and to them that are upright in their hearts."
Proverbs 15:11: "are before the LORD: the hearts of the children of men?"
Proverbs 17:3: "for gold: trieth the hearts."
Proverbs 21:2: "but the LORD pondereth the hearts."
Ezekiel 16:30: "How weak is thine heart, saith GOD, seeing thou doest"