'Fixed' in the Bible

Thus says the Lord,Who gives the sun for light by dayAnd the fixed order of the moon and the stars for light by night,Who stirs up the sea so that its waves roar;The Lord of hosts is His name:

“If this fixed order departsFrom before Me,” declares the Lord,“Then the offspring of Israel also will ceaseFrom being a nation before Me forever.”

Thus says the Lord, ‘If My covenant for day and night stand not, and the fixed patterns of heaven and earth I have not established,