Proverbs 31:18 in the World English Bible
She perceives that her merchandise is profitable. Her lamp doesn’t go out by night.
Context
17 She girdeth her loins with strength, and strengtheneth her arms.
18 She perceiveth that her merchandise is good: her candle goeth not out by night.
19 She layeth her hands to the spindle, and her hands hold the distaff.