Unix simple question grep command

[121854]

I need to search in three files (a1, b2, b3)for "rejected bans".

I would like to retrieve the "rejected bans" string located in these three files, Is there a unix command that I can executed that can provide me this information.

If someone know and let me know that would be great.

Try ls -ltr |grep a* | grep reject bans
but don't work.

 

[motoslide]

grep "rejected bans" a1 b2 b3