'Twenty' in the Bible

And from that day the ark remained in Kiriath-jearim for a very long time, for it was twenty years [until the reign of King David]; and all the house of Israel lamented (wailed) and grieved after the Lord.

That first slaughter which Jonathan and his armor bearer made was about twenty men within about half a [plow] furrow in a plot of land [the area of which a yoke of oxen could plow in a day].