What is the meaning of the Prophet's saying, peace and blessings be upon him: "He will be encircled with it from above seven earths"?

The hadith with the exact wording mentioned in the question has not been found. What is likely intended is: "Whoever usurps even a handspan of land, will have it tied around his neck from seven earths," which is an agreed-upon hadith. This hadith has two interpretations: either he will be burdened to carry what he usurped on the Day of Judgment, and it will be like a collar around his neck, or he will be punished by being swallowed into seven earths, and each earth will be a collar around his neck. It could also mean that all that is transported will be placed as a collar around his neck.