2 Esdras 14:38

38 And the next day, behold, a voice called me, saying, Esdras, open thy mouth, and drink that I give thee to drink.

2 Esdras 14:38 In-Context

36 Let no man therefore come unto me now, nor seek after me these forty days.
37 So I took the five men, as he commanded me, and we went into the field, and remained there.
38 And the next day, behold, a voice called me, saying, Esdras, open thy mouth, and drink that I give thee to drink.
39 Then opened I my mouth, and, behold, he reached me a full cup, which was full as it were with water, but the colour of it was like fire.
40 And I took it, and drank: and when I had drunk of it, my heart uttered understanding, and wisdom grew in my breast, for my spirit strengthened my memory:
The King James Version is in the public domain.