Earth has foundations so that it will not move and is set on pillars
At earth's creation, God laid a circle on the face of the deep and set up it' foundations. Circle and sphere are different words in Hebrew. Heaven is also a circle, meaning it has boundaries.
Psalm 104:5
You who laid the foundations of the
earth, So
that it should not be
moved forever,
1 Samuel 2:8
He raises up the poor from the dust; he lifts the needy from the ash heap to make them sit with princes and inherit a seat of honor. For the pillars of the earth are the LORD’s, and on them he has set the world.
Psalm 75
We praise you, God,
we praise you, for your Name is near;
people tell of your wonderful deeds.
2 You say, “I choose the appointed time;
it is I who judge with equity.
3 When the earth and all its people quake,
it is I who hold its pillars firm.
Isaiah 40:22
He sits enthroned above the circle of the earth, and its people are like grasshoppers. He stretches out the heavens like a canopy, and spreads them out like a tent to live in.
Job 22:14
Thick clouds cover Him, so that He cannot see, And He walks above the circle of heaven.’
I have been established from everlasting,
Proverbs 8
From the beginning, before there was ever an earth.
24 When there were no depths I was brought forth,
When there were no fountains abounding with water.
25 Before the mountains were settled,
Before the hills, I was brought forth;
26 While as yet He had not made the earth or the [e]fields,
Or the [f]primal dust of the world.
27 When He prepared the heavens, I was there,
When He drew a circle on the face of the deep,
28 When He established the clouds above,
When He strengthened the fountains of the deep,
29 When He assigned to the sea its limit,
So that the waters would not transgress His command,
When He marked out the foundations of the earth,
30 Then I was beside Him as [g]a master craftsman;
And I was daily His delight,
Rejoicing always before Him,
31 Rejoicing in His inhabited world,
And my delight was with the sons of men.