serverHomeDir='/home/somepath/ftp/'
backupDirAbsolutePath=${serverHomeDir}'_sqldump_'
backupDbName1='2021-08-27-03-56-somesite-latin2.sql'
backupDbName2='2021-08-27-03-56-somesite-latin1.sql'
backupDbName3='2021-08-27-03-56-somesite-utf8.sql'
backupDbName4='2021-08-27-03-56-somesite-utf8mb4.sql'
scp -i ~/.ssh/id_rsa.pub user@server.domain.com:${backupDirAbsolutePath}/"{$backupDbName1,$backupDbName2,$backupDbName3,$backupDbName4}" .
. – at the end will download the files to current dir
-i ~/.ssh/id_rsa.pub – assuming that you established ssh to your server with .pub key