They had summoned her to their aid, not the other way round.

That is why I thought it best to summon this lady to your aid.

The blade had merely summoned the dead to its aid; it had no control over them.

What can be summoned now from Thanth to our aid?

They march east to Imladris summoning all folk to their aid.

"And you gave the hand the power to summon the dead to my aid?"

He also can summon an invincible monster to his aid.

I have summoned all your advice and my own strength to my aid.

Summon the birds from the trees to our aid?

And a -s, bird has been sent, summoning others to your aid.