What beatles song had the sitar in it?

One that comes to mind is 'Within you and without you", maybe a few others; George took lessons from Ravi Shankar so there are probably more...

The first sitar appearance in a song recorded by the Beatles was in "Norwegian Wood" on Rubber Soul. This was before George had any formal sitar instruction and had just picked one up after hearing it used by a few other bands like The Kinks and The Yardbirds.