וַיֹּ֗אמֶר הִשָּֽׁבְעָה֙ לִ֔י וַיִּשָּׁבַ֖ע ל֑וֹ וַיִּשְׁתַּ֥חוּ יִשְׂרָאֵ֖ל עַל־רֹ֥אשׁ הַמִּטָּֽה׃ (פ)
And he said: ‘Swear unto me.’ And he swore unto him. And Israel bowed down upon the bed’s head.
Read kabbalistic (mystical) interpretation of Genesis 47:31: and classical mystical sources.