הִנֵּ֗ה מִטָּתוֹ֙ שֶׁלִּשְׁלֹמֹ֔ה שִׁשִּׁ֥ים גִּבֹּרִ֖ים סָבִ֣יב לָ֑הּ מִגִּבֹּרֵ֖י יִשְׂרָאֵֽל׃
Behold, it is the litter of Solomon; Threescore mighty men are about it, Of the mighty men of Israel.
Reshit Chokhmah
Also in the Midrash they explained the verse “every man with his sword on his thigh” (Song of Songs 8:9) relating to being cautious of the Brit, “because of dread in the night” that they are cautious of sin, which is prevalent at night-time.