'Pen' in the Bible

They lie around on beds decorated with ivory, and sprawl out on their couches. They eat lambs from the flock, and calves from the middle of the pen.

When the fig tree does not bud, and there are no grapes on the vines; when the olive trees do not produce, and the fields yield no crops; when the sheep disappear from the pen, and there are no cattle in the stalls,

I have many things to write to you, but I do not wish to write to you with pen and ink.