長阿含經 30.p142

30.p142

“That land has a lake named Sudarśana that’s a hundred yojanas across. Its water is clear and unpolluted, and it’s ringed by stepped embankments made of the seven treasures. The lake has on all four sides seven balustrades, seven nettings, and seven rows of trees … and countless birds sing to each other peacefully as before. That Lake Sudarśana has a tree to its north named Āmra, which is 3.5 kilometers around and stands fifty kilometers tall. It’s branches and leaves spread out in all four directions to cover twenty-five kilometers.