<p>I think this is it:
</p><p>""Always an even trade, Sorceress." The man snapped a second salute, this one sharper, and in its way more personal. Years and years of this. Insisting I'm family to them, one of the 2nd Army—the oldest intact force, one of the Emperor's own. Always an even trade, Sorceress. Save our skins, we'll save yours. Family, after all. Why, then, do I always feel so estranged from them? Tattersail returned the salute."
</p><p>Gardens of the Moon, Chapter 2
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