Job 11:9

The measure thereof is longer than the earth -The measure of the knowledge of God. The extent of the earth would be one of the longest measures known to the ancients. Yet it is now impossible to ascertain what ideas were attached, in the time of Job, to the extent of the earth - and it is not necessary to know this in order to understand this expression. It is morally certain that the prevailing ideas were very limited, and that a small part of the earth was then known. The general belief seems to have been, that it was a vast plain, surrounded by water - but how supported, and what were its limits, were evidently matters to them unknown.