Correct. The entry card you fill out on the plane literally has "DEATH FOR DRUG TRAFFICKERS UNDER SINGAPORE LAW" in red letters on the back. Easily verified by a web search.[1] Flying in with a pound of Marijuana to any country where it isn't legal is an incredibly bad idea, in parts of the world it may be suicidal.
[1]: https://proxy.duckduckgo.com/iu/?u=https%3A%2F%2Fassets3.thr...