Free from the author via KDP Select @
Amazon:
A Man and His God by Janet Morris (
ISFDB,
Wikipedia), a story in her The Sacred Band of Stepsons (
Wikipedia) sub-series within the popular "Thieves' World" shared world anthology series (
Wikipedia), which originally appeared in 1981 in the
Shadows of Sanctuary volume from Ace Books and has been reprinted several times since in assorted anthologies, according to its ISFDB entry.
This seems to be a slightly revised edition from the original, and is also apparently part of a ground-breaking depiction of LGBT issues in popularly-available widely-distributed mainstream fantasy.
An immortalized cavalry commander joins forces with the high-priest of the god of war.... Where myth meets legend, two men kiss and Tempus' world changes forever. Meet and mourn the Slaughter Priest in "A Man and His God." In this canonical short novel, the Sacred Band begins when Abarsis, Slaughter Priest, brings his Sacred Band to Tempus and dies in his arms.
In this pivotal story, the Sacred Band is formed from love and death....
This landmark short novel contains what may be the first male/male kiss in modern fantasy, and was widely reprinted, after appearing in somewhat different form in Thieves' World(r), in the Science Fiction Book Club, two Issac Asimov collections, and the Baen Book "Tempus" by Janet Morris.