וַֽיהוָה֙ יָשִׁ֣יב לָאִ֔ישׁ אֶת־צִדְקָת֖וֹ וְאֶת־אֱמֻנָת֑וֹ אֲשֶׁר֩ נְתָנְךָ֨ יְהוָ֤ה ׀ הַיּוֹם֙ בְּיָ֔ד וְלֹ֣א אָבִ֔יתִי לִשְׁלֹ֥חַ יָדִ֖י בִּמְשִׁ֥יחַ יְהוָֽה׃
And the LORD will render to every man his righteousness and his faithfulness; forasmuch as the LORD delivered thee into my hand to-day, and I would not put forth my hand against the LORD’S anointed.
Rashi on I Samuel
Each man. To each righteous man.9 Who does as I have done.—Radak. Dovid was hinting to ה׳ that just as Shaul’s life was precious in his eyes, so too may his life be precious in the eyes of ה׳.