Matthew 25:3-10

for the thoughtless ones took their lamps but took no oil with them.

1 Thessalonians 2:9

You remember, brothers, our hard labor and toil. We kept up our habit of working night and day, in order not to be a burden to any of you when we preached to you.

2 Thessalonians 3:7-9

You know yourselves how you ought to follow my example; for I was not a shirker when I was with you;

Treasury of Scripture Knowledge

Summary

She perceiveth that her merchandise is good: her candle goeth not out by night.

Bible References

Her candle

Matthew 25:3
for the thoughtless ones took their lamps but took no oil with them.
1 Thessalonians 2:9
You remember, brothers, our hard labor and toil. We kept up our habit of working night and day, in order not to be a burden to any of you when we preached to you.
2 Thessalonians 3:7
You know yourselves how you ought to follow my example; for I was not a shirker when I was with you;