A neat Masoretic note on II Sam. 13.
Something like, שׁממה [occurs] three times (ג̇), twice defectively (ב̇ חָסֵר) and once fully (וחד מָלֵא). [Ordered by appearance], [the first is] ותשב תמר ושממה, [the second, which is plene]כי־רבים בני־שוממה מבני, [and the third] נתנני שממה.