הִנֵּ֗ה מִטָּתוֹ֙ שֶׁלִּשְׁלֹמֹ֔ה שִׁשִּׁ֥ים גִּבֹּרִ֖ים סָבִ֣יב לָ֑הּ מִגִּבֹּרֵ֖י יִשְׂרָאֵֽל׃
Voyez, c’est la litière de Salomon! Elle est entourée de soixante braves, d’entre les héros d’Israël;
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.