He had been waiting for a moment to show her up.

If you would be so kind as to wait for just a moment.

And he was waiting for the right moment to speak.

Waiting for the right moment, but now time has run out.

He was waiting for the right moment to go forward.

He was waiting in his campaign office, alone for the moment.

Now she just had to wait for the right moment.

It was best to wait for a better moment of action.

Your men did; I thought you were just waiting for the right moment.

I've been waiting for the right moment to bring this up.