In the company of the Prophet of Allah (S) we used to fight our parents, sons, brothers and uncles, and this continued us in our faith, in submission, in our following the right path, in endurance over the pangs of pain and in our fight against the enemy. 
A man from our side and one from the enemy would pounce upon each other like energetic men contesting as to who would kill the other; sometime our man got over his adversary and some-time the enemy's man got over ours.
When Allah had observed our truth, He sent ignominy to our foe and sent His succour to us till Islam got established (like the camel) with neck on the ground and resting in its place. By my life, if we had also behaved like you, no pillar of (our) religion could have been raised, nor could the tree of faith have borne leaves. By Allah, certainly you will now milk our blood (instead of milk) and eventually you will face shame.1
(1) Nasr, Siffin, 520;
(3) al-Thaqafi, al-Gharat;
(4) al-Waqidi, al-Jamal; for (3) and (4) see Ibn Abi al-Hadid, I, 348-355.