Mark 16:17-19

16:17 These signs will accompany those who believe: In my name they will drive out demons; they will speak in new languages; 16:18 they will pick up snakes with their hands, and whatever poison they drink will not harm them; they will place their hands on the sick and they will be well.” 16:19 After the Lord Jesus had spoken to them, he was taken up into heaven and sat down at the right hand of God.

tn Grk “tongues,” though the word is used figuratively (perhaps as a metonymy of cause for effect). To “speak in tongues” meant to “speak in a foreign language,” though one that was new to the one speaking it and therefore due to supernatural causes. For a discussion concerning whether such was a human language, heavenly language, or merely ecstatic utterance, see BDAG 201-2 s.v. γλῶσσα 2, 3; BDAG 399 s.v. ἕτερος 2; L&N 33.2-4; ExSyn 698; C. M. Robeck Jr., “Tongues,” DPL, 939-43.

tn For further comment on the nature of this statement, whether it is a promise or prediction, see ExSyn 403-6.