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I would say to look at the GREATEST abomination committed by Israel, which caused God to have Babylon clean their clocks. Related to the Mark of the Beast? Of course it is.
The Greatest Abomination
Ezek 8:15 Then said he unto me, Hast thou seen this, O son of man? turn thee yet again, and thou shalt see greater abominations than these.
Ezek 8:16 And he brought me into the inner court of the LORD'S house, and, behold, at the door of the temple of the LORD, between the porch and the altar, were about five and twenty men, with their backs toward the temple of the LORD, and their faces toward the east; and they worshipped the sun toward the east.
2 Chr 36:21 To fulfil the word of the LORD by the mouth of Jeremiah, until the land had enjoyed her sabbaths: for as long as she lay desolate she kept sabbath, to fulfil threescore and ten [70] years.
Jer 17:27 But if ye will not hearken unto me to hallow the sabbath day, and not to bear a burden, even entering in at the gates of Jerusalem on the sabbath day; then will I kindle a fire in the gates thereof, and it shall devour the palaces of Jerusalem, and it shall not be quenched.
Jer 25:11 And this whole land shall be a desolation, and an astonishment; and these nations shall serve the king of Babylon seventy years.