John Mark
Mark 16:16BSB·traditional attribution

Whoever believes and is baptized will be saved, but whoever does not believe will be condemned.

John Calvin Reformed @genevareformer

Mark 16:16 He who shall believe and be baptized shall be saved. This promise was added in order to allure all mankind to believe; as it is followed, on the other hand, by a threatening of awful destruction, in order to terrify unbelievers.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The conviction which Christ gave his apostles of the truth of his resurrection (Mar 16:14); He appeared to them himself, when they were all together, as they sat at meat, which gave him an opportunity to eat and drink with them, for their full satisfaction; see Act 10:41.

Commenting on Mark 16:14-18

John Gill Reformed Baptist @doctorgill

And these signs shall follow them that believe,.... Not all of them, but some; and not always, only for a time; and which were necessary for the confirmation of the Gospel, and the establishment of Christianity in the world; and not only believing hearers, but believing ministers of the word, are chiefly designed; and this is said, for the encouragement both of those that preach...