Proverbs 20:28 New English Translation

²⁸Loyal love and truth^[a] preserve a king,
and his throne is upheld by loyal love.^[b]

Proverbs 20:28 tn The first line uses two Hebrew words, חֶסֶד וֶאֱמֶת (khesed veʾemet, “loyal love and truth”), to tell where security lies. The first word is the covenant term for “loyal love; loving-kindness; mercy”; and the second is “truth” in the sense of what is reliable and dependable. The two words often are joined together to form a hendiadys: “faithful love.” That a hendiadys is intended here is confirmed by the fact that the second line uses only the critical word חֶסֶד.
Proverbs 20:28 sn The emphasis is on the Davidic covenant (2 Sam 7:11-16; Ps 89:19-37). It is the Lord and his faithful love for his covenant that ultimately makes the empire secure. But the enjoyment of divine protection requires the king to show loyal love as well.

New English Translation (NET)