A king (or queen) is pouring libation to the Stormgod. Behind him (in the right lower corner) a servant is restraining a bull, probably to be sacrificed soon. Above, an inscription in hieroglyphic Luwian give some information about the personage represented.
Limestone relief from the Lions Gate at Milid / Arslantepe (7 km northeast of modern Malatya).
Neo-Hittite sculpture in traditional style, 1050-850 BC.

Luwian is an ancient language or group of languages of the Anatolian branch of the Indo-European language family. The two varieties of Luwian are named for the scripts that they were written in: Cuneiform Luwian (CLuwian) and Hieroglyphic Luwian (HLuwian). As to whether these were one language or two, there is no consensus. Luwian is closely related to Hittite.

Correspondent: J.M.Criel, Antwerpen
Sources: ‘Anadolu Uygarlıkları’ (Anatolian Civilisations) – Prof.Dr. Ekrem Akurgal.
Website of ‘hittitemonuments.com’ & Wikipedia