Where is kernel-src on FC3

[moon at dreaming.to]

Hello, all,

I've used Fedora Core 3 since yesterday. 
I'm using yum or sypnatic about managing packages.
And I could not find out kernel source 'cause I
wanted to re-compile my kernel.

I have traced directory trees on website of freshrpms.
(http://ayo.freshrpms.net/fedora/linux/3/i386/)
But still I couldn't find out that. Where or How 
can I get kernel source package ?

Thanks,
Op