Matius 8:16

8:16 When it was evening, many demon-possessed people were brought to him. He drove out the spirits with a word, and healed all who were sick. ¹ 

Markus 16:17

16:17 These signs will accompany those who believe: In my name they will drive out demons; they will speak in new languages; ² 

[8:16]  ¹ sn Note how the author distinguishes healing from exorcism here, implying that the two are not identical.

[16:17]  ² 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.