וַיֹּ֨אמֶר אֲלֵהֶ֣ם ׀ רְאוּבֵן֮ אַל־תִּשְׁפְּכוּ־דָם֒ הַשְׁלִ֣יכוּ אֹת֗וֹ אֶל־הַבּ֤וֹר הַזֶּה֙ אֲשֶׁ֣ר בַּמִּדְבָּ֔ר וְיָ֖ד אַל־תִּשְׁלְחוּ־ב֑וֹ לְמַ֗עַן הַצִּ֤יל אֹתוֹ֙ מִיָּדָ֔ם לַהֲשִׁיב֖וֹ אֶל־אָבִֽיו׃
And Reuben said unto them: ‘Shed no blood; cast him into this pit that is in the wilderness, but lay no hand upon him’—that he might deliver him out of their hand, to restore him to his father.
Read kabbalistic (mystical) interpretation of Genesis 37:22: and classical mystical sources.