It was narrated that Jubair bin Nufair said:
“Jubair said to me:
‘Let’s go to Dhu Mikhmar, who was a man from among the Companions
of
the Prophet (ﷺ).’ So I went with them and he asked him about
the
peace treaty (with the Romans). He said: ‘I heard the Prophet
(ﷺ)
say: “The Romans will enter into a peace treaty with you,
then you and
they will fight one another as enemies, and you will be
victorious;
you will collect the spoils of war and be safe. Then you
will come
back until you stop in a meadow with many hillocks. A man
from among
the people of the Cross will raise the Cross and will say:
‘The Cross
has prevailed.’ Then a man among the Muslims will
become angry and
will go and break the Cross. Then the Romans will
prove treacherous
(breaking the treaty) (and will gather) for the
fierce battle.”