Parashas Masei · Passuk 33:46 · TT note 1
Chabad.org — English translation + Rashi
Torah Temimah points to Yevamos 13b (TT note on “דִּבְלָתָיְמָה”).
English: It was taught: Rabbi Nechemya says, every word that needs a lamed at its beginning, Scripture placed a heh at its end — for example, Divlasaim becomes Divlasaymah.
Grammar / orthography — the final heh standing in for an initial lamed of direction.
The place-name Almon-diblathaim illustrates a standing orthographic pattern: a final heh may mark the directional sense that would otherwise be expressed by an initial lamed.