Albert Barnes Commentary Job 11:18

"And thou shalt be secure, because there is hope; Yea, thou shalt search [about thee], and shalt take thy rest in safety." — Job 11:18 (ASV)

And you will be secure - You will feel confident that your prosperity will be permanent, and you will be free from the distressing anxieties and fears which you now have.

You will dig about yourself - The Chaldee renders this, “you will prepare for yourself a sepulchre, and will lie down in safety.” The word used here (חפר châphar) has two significations. It means:

1. “to dig”—for example, a well, and under this signification to search out, to explore; and,
2. to be ashamed, to blush (Isaiah 1:29).

According to Gesenius, the latter here is the signification. “Now you are ashamed, then you will dwell in quiet,” Lexicon. So Noyes renders it. Dr. Good translates it, “yes, you will look around;” Rosenmuller, “you are suffused with shame.” This is, probably, the true sense; and the idea is, that though he was now covered with shame, yet he would lie down in peace and safety if he would return to the Lord.