Ben Sira 34:4

4 From an unclean thing what can be clean? And from something false what can be true?

Ben Sira 34:4 In-Context

2 As one who catches at a shadow and pursues the wind, so is anyone who believes in dreams.

3 What is seen in dreams is but a reflection, the likeness of a face looking at itself.

4 From an unclean thing what can be clean? And from something false what can be true?

5 Divinations and omens and dreams are unreal, and like a woman in labor, the mind has fantasies.

6 Unless they are sent by intervention from the Most High, pay no attention to them.