In the film, High Noon (1952), with the theme song, "Do Not Forsake Me, Oh My Darlin'" ("The Ballad of High Noon"), the words of this particular song are sung by country western star Tex Ritter. Ritter was able to star in around 75 western films.

Here Ritter's song directly refers to how Will Kane (Gary Cooper) can't have a safe life with Amy Fowler-Kane (Grace Kelly) until he has eliminated the threats that face him. He wants her to stay with him just a while longer until it's all over; she should not give up on him. Is this the best thing for each of them? Is it good for them to stay together?

Is Amy abandoning (or "forsaking") Will if he chooses to stay and fight after their wedding (and risk being killed)? He is asked by his wife to just run away. This will make their lives better. But, now in this instance, they are truly facing a moral dilemma.

Also, in "High Noon" the goal of the song lyrics is for them to briefly tell the film's entire story, a tale of cowardice and conformity in a small Western town. So the entire music score was built around a single western-style ballad. Dimitri Tiomkin who provided the film score created an unconventional score for the film. He eliminated violins from the music ensemble and along with other instruments, he added a subtle harmonica sound in the background. He used this devise to give the film a "rustic, deglamorized sound to suit all the anti-heroic sentiments" expressed by the total story.

More Info: en.wikipedia.org