I use a 35mm Voigtlander Nokton f/1.4. It's decent, especially for close-up work like portraits and such. At greater distance it disappoints a little, but it's a good performer.
Then there's the Nokton f/1.2, of course. You might also consider the Zeiss lenses, which are somewhere in between the Voigtlander/Cosina and Leica.
Writing in incomplete sentences does not make your message coherent. What about the lens? Do you have one? Do you want one? Did you lose one? Did space aliens steal yours?