Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Slavs:

"

Around the 6th century, Slavs appeared on Byzantine borders in large numbers.[2] Byzantine records note that Slav numbers were so great, that grass would not regrow where the Slavs had marched through[citation needed]. Military movements resulted in even the Peloponnese and Asia Minor being reported to have Slavic settlements.[3] This southern movement has traditionally been seen as an invasive expansion.[4] By the end of the 6th century, Slavs had settled the Eastern Alps regions.[5]