Minecraft how do I summon 1000 zombies at once?

Ma
7

What's the order for it? Version 1.8.9

Sa
-1

Just write: summon 1000 zombies

Ma
-1

It does not work

Sa
-1

Well then I'd be unlucky

Sa
-1
Sa
-1

Write "/ summon zombie" 1000 times

Ma
-1

That does not work in Vanilla Minecraft. Sorry

ja
-1

In Minecraft Vanilla, this is not possible with one command.