It has been narrated (through a still difterent chain of transmitters) by Anas that the Companions of Muhammad ﷺ were chanting on the day of the Battle of the Ditch:
We are those who have sworn allegiance to Muhammad
(And made a covenant with him) to follow Islam as long as we live.
Hammad is not sure whether Anas said:" Alal-Islam" or," Alal-Jihad". And the Holy Prophet ﷺ was chanting:
O God, the real good is the good of the Hereafter,
So forgive Thou the Ansar and the Muhajirs.