King James Version (KJV)
Thy word have I hid in mine heart, that I might not sin against thee.
Modern English
I have stored up your word in my heart, that I might not sin against you.
Hebrew
בְּלִבִּ֥י צָפַ֥נְתִּי אִמְרָתֶ֑ךָ לְמַ֝֗עַן לֹ֣א אֶחֱטָא לָֽךְ׃
blibiy ṣapantiy ʾimrateka lmaʿan loʾ ʾeḥeṭaʾ lak