Genesis 1:4 (BSB)

And God saw that the light was good, and He separated the light from the darkness.

From Genesis 1. Also in the ESV.

Commentary on Genesis 1:4

• John Calvin (Reformed), Calvin's Commentaries on Genesis 1:4: 4 And God saw the light Here God is introduced by Moses as surveying his work, that he might take pleasure in it. But he does it for our sake, to teach us that God has made nothing without a certain reason and design. And we ought not so to understand the words of Moses as if God did not know that his work was good, till it was finished.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Genesis 1:3-5: We have here a further account of the first day's work, in which observe, 1. That the first of all visible beings which God created was light; not that by it he himself might see to work (for the darkness and light are both alike to him), but that by it we might see his works and his glory in them, and might work our works while it is day.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Genesis 1:4: And God saw the light, that it was good,.... Very pleasant and delightful, useful and beneficial; that is, he foresaw it would be good, of great service, as Picherellus (k) interprets it; for as yet there were no inhabitants of the earth to receive any advantage by it; see Ecc 11:7 besides, it was doubtless good to answer some present purposes, to prepare for the...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Genesis 1:3-5: THE FIRST DAY. (Gen 1:3-5) God said--This phrase, which occurs so repeatedly in the account means: willed, decreed, appointed; and the determining will of God was followed in every instance by an immediate result. Whether the sun was created at the same time with, or long before, the earth, the dense accumulation of fogs and vapors which enveloped the chaos had covered the globe with a settled gloom.