G2845–κοίτη–koitē

And he, from inside the house, would say in answer, Do not be a trouble to me; the door is now shut, and my children are with me in bed; it is not possible for me to get up and give to you?

κοίτην koitēn “bed”

And not only so, but Rebecca being about to have a child by our father Isaac--

κοίτην koitēn “conception”

With right behaviour as in the day; not in pleasure-making and drinking, not in bad company and unclean behaviour, not in fighting and envy.

κοίταις koitais “in sexual immorality”

Let married life be honoured among all of you and not made unclean; for men untrue in married life will be judged by God.

κοίτη koitē “marriage bed”