What is moses supposes his toeses are roses origin?

The phrase "Moses supposes his toeses are roses" is from the 1952 movie musical Singin' in the Rain. The scene features actors Gene Kelly and Donald O'Connor portraying characters who attempt to turn a nonsensical phrase into a song and dance number. The phrase itself is simply wordplay, with "toeses" being a rhyming and nonsensical variation of "toes" and "roses" being a common flower. The scene has become a memorable and iconic moment in musical film history.