Esias 40:21

21 Will ye not know? will ye not hear? has it not been told you of old? Have ye not known the foundations of the earth?

Esias 40:21 In-Context

19 Has not the artificer made an image, or the goldsmith having melted gold, gilt it over, made it a similitude?
20 For the artificer chooses out a wood that will not rot, and will wisely enquire how he shall set up his image, and that it should not be moved.
21 Will ye not know? will ye not hear? has it not been told you of old? Have ye not known the foundations of the earth?
22 he that comprehends the circle of the earth, and the inhabitants in it are as grasshoppers; he that set up the heaven as a chamber, and stretched out as a tent to dwell in:
23 he that appoints princes to rule as nothing, and has made the earth as nothing.

The Brenton translation of the Septuagint is in the public domain.