Acts 2:19

19 And I will perform wonders in the sky
Or “in the heaven.” The Greek word οὐρανός (ouranos) may be translated “sky” or “heaven” depending on the context. Here, in contrast to “the earth below,” a reference to the sky is more likely.
above
and miraculous signs
Here the context indicates the miraculous nature of the signs mentioned; this is made explicit in the translation.
on the earth below,
blood and fire and clouds of smoke.
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