יְהוָ֗ה אֱ֠לֹהֵי אַבְרָהָ֞ם יִצְחָ֤ק וְיִשְׂרָאֵל֙ אֲבֹתֵ֔ינוּ שֳׁמְרָה־זֹּ֣את לְעוֹלָ֔ם לְיֵ֥צֶר מַחְשְׁב֖וֹת לְבַ֣ב עַמֶּ֑ךָ וְהָכֵ֥ן לְבָבָ֖ם אֵלֶֽיךָ׃
O LORD, the God of Abraham, of Isaac, and of Israel, our fathers, keep this for ever, even the imagination of the thoughts of the heart of Thy people, and direct their heart unto Thee;
Rashi on I Chronicles
keep this forever Remember for us this donation as a great deed and as a righteous act.
Rashi on I Chronicles
even the creation of the thoughts of Your people for the creation of their two hearts and their thoughts are for good, and this refers back to “for You test the heart, etc.”
Rashi on I Chronicles
and prepare their hearts to You Their two hearts are made perfect to be one heart to You, and so you shall explain...