מַה־דּוֹדֵ֣ךְ מִדּ֔וֹד הַיָּפָ֖ה בַּנָּשִׁ֑ים מַה־דּוֹדֵ֣ךְ מִדּ֔וֹד שֶׁכָּ֖כָה הִשְׁבַּעְתָּֽנוּ׃
Rashi on Song of Songs
With what does your beloved excel another beloved. This is what the nations were asking Yisroel, “What is it about your God more than all the other gods, that you allow yourselves to be burned and hanged because of Him?”36I.e., why are you so loyal to a God Who has forsaken you? (Metzudas Dovid)
Ezra ben Solomon on Song of Songs
How is your beloved fairer than another, From all of the seventy thrones of Kingship.
Rashi on Song of Songs
That you bind us under oath. To testify before Him about your love.