Sayyiduna Abu Maryam al-Ghassani (may Allah be pleased with him) said: I went on an expedition with the Messenger of Allah (peace and blessings be upon him). He (peace and blessings be upon him) handed me the banner, and I hurled stones in front of him (peace and blessings be upon him). He (peace and blessings be upon him) was pleased with that and he (peace and blessings be upon him) made du'a for me.
Hadith Referenceالمعجم الكبير للطبراني / مسند من يعرف بالكنى / 19036