NET
18 Jonathan said to him, “Tomorrow is the new moon, and you will be missed, for your seat will be empty.
Darby
18 And Jonathan said to him, To-morrow is the new moon; and thou wilt be missed, for thy seat will be empty;
KJV
18 Then Jonathan said to David, To morrow [is] the new moon: and thou shalt be missed, because thy seat will be empty.