three winks

He then turned and said to Brocklehurst: "It's all right. He's seen my three winks."

All this took the boy but three winks of the eye to observe; though, in the time, he had not winked once, so fascinated was he by the gaze of those wild, sly eyes, which shone like balls of green fire, rather than eyes.

Now, shut up, Et, and let me get three winks myself.

If I'm going to do your friend any good I've got to get three winks.

He had dismissed all his perplexities, and was about to abandon himself to three winks of sleep, when something on the horizon attracted his attention.