Job 26:10 says, “He has inscribed a circle on the surface of the waters at the boundary of light and darkness.” (NASB).  Let’s also consider that verse from the KJV.  It says, “He hath compassed the waters with bounds, until the day and night come to an end.”  Some translations use the word ‘bounds or boundary’, while some translations use the word ‘circle’ The Hebrew word is ‘khoke’ and means: an appointment (of time, space, quantity, labor or usage):—appointed, bound, commandment, convenient, custom, decree(-d), due, law, measure, × necessary, ordinance(-nary), portion, set time, statute, task.

The thought is that the Lord has established a boundary, or circle, for the waters above and for the seas below.  I will quote from one of our answers concerning Job 26:10, “Now, let’s consider your question by reading Job 26:10 from the NASB. It says, “He has inscribed a circle on the surface of the waters at the boundary of light and darkness.” After speaking of the waters above, which are held in a ‘thick cloud’, Job now speaks of the waters on the earth, those that are in the seas. He considers the waters beneath, and the horizon, where darkness meets light. The waters of the earth cannot pass their appointed bounds. We read in Psalm 104:9, “Thou hast set a bound that they may not pass over; that they turn not again to cover the earth.” The word ‘circle’ here seems to refer to the horizon, which appears to be circular in shape. The boundary is far distant, marked only where light merges with darkness. It’s where light and darkness begin and end when the sun rises in the east and sets in the west. God placed the horizon on the sea. He separates light and darkness.”

The word ‘circle’ in Job 26:10 is not addressing the shape of the earth per se, but a marked off line between waters and waters.  The use of the word ‘circle’ certainly IMPLIES that the world is round for to view the horizon from afar definitely shows the curvature of the earth.  The shape of the earth is addressed in Isaiah 40:22 which says, “It is He who sits above the circle of the earth, and its inhabitants are like grasshoppers, Who stretches out the heavens like a curtain and spreads them out like a tent to dwell in.” (NASB).  There can be no doubt then that the shape of the earth is the shape of a circle…or is round.  We get a picture of the Lord sitting above the earth, looking down upon the globe-shaped figure He created and caused to be inhabited. 

The Hebrew word for circle is ‘khoog’.  It is used just three times in the Bible.  In Job 24:14, it is translated ‘circuit’.  In Proverbs 8:27, it is translated ‘compass’.  And in Isaiah 40:22, it is translated ‘circle’.  All three of these uses point to the truth that the earth is round.  (412.2)