In the US, it is a criminal offense to perform the statement "I want to kill the president". However, to simply quote it, as I just did, is permissible; the statement is by itself not illegal.
In the US, is is also a criminal offense to quote a copyrighted work in public, unless this is covered by fair use laws and so on. The following computer code would violate the anti-circumvention provisions of the DMCA, had I not redacted a line (the horror!):
#define m(i)(x[i]^s[i+84])<<
unsigned char x[5],y,s[2048];main(n){for(read(0,x,5);read(0,s,n=2048);write(1,s
,n))if(s[y=s[13]%8+20]/16%4==1){int i=m(1)17^256+m(0)8,k=m(2)0,j=m(4)17^m(3)9^k
[redacted]
;c=c>y)c+=y=i^i/8^i>>4^i>>12,i=i>>8^y<<17,a^=a>>14,y=a^a*8^a<<6,a=a>>8^y<<9,k=s
[j],k="7Wo~'G_\216"[k&7]+2^"cr3sfw6v;*k+>/n."[k>>4]*2^k*257/8,s[j]=k^(k&k*2&34)
*6^c+~y;}}
In New Zealand and Australia, it is, regardless of context, a criminal offense to post or possess the "The Great Replacement" manifesto, which is 74 pages long. This applies regardless of context; it is not permitted to quote it in full, even if you are not performing it. However, short fragments are fine.
What is the shortest statement that is, unto itself, a crime to communicate in any OECD country, use-mention distinction notwithstanding?