from the sermons of Imam Ali (pace be upon him ):sermon12

 Does your brother love us? …

from the book Sermons of Imam Ali Investigation by Saleh

Nahjul Balagha Part 1 The Sermons Sharif Razi

Source: https://al-islam.org/nahjul-balagha-part-1-sermons

When1 Allah gave him (Amir al-mu’minin) victory over the enemy at the Battle of Jamal one of his comrades said on that occasion, “I wish my brother so-and-so had been present and he too would have seen what success and victory Allah had given you,” whereupon Amir al-mu’minin said:

“Did your brother hold me friend?”

He said: “Yes,”

Then Amir al-mu’minin said:

In that case he was with us. Rather in this army of ours even those persons were also present who are still in the loins of men and wombs of women. Shortly, time will bring them out and faith will get strength through them

Alternative Sources for Sermon 12

(1) Al-Barqi, al-Mahasin, I262.