放下屠刀，立地成佛用英语怎么说？

可以直译：
1.The butcher who lays down his knife at once becomes a Buddha。

2.Put away the knife, and the butcher becomes a Buddha immediately。

3.A butcher becomes a Buddha the moment he drops his cleaver.

意译:A wrongdoer may become a man of virtue once he does good.

A butcher becomes a Buddha the moment he drops his cleaver.
这是直译。意译的不晓得咯

you won't make the god until you unload your gun:)

Put down the butcher's knife and become Buddha