So then tongues are for a sign (sēmeion | σημεῖον | acc sg neut), not for believers but for unbelievers, while prophecy is not for unbelievers but for believers.

For Jews demand signs (sēmeia | σημεῖα | acc pl neut) and Greeks are looking for wisdom,

by the power of signs (sēmeiōn | σημείων | gen pl neut) and wonders, by the power of the Spirit of God, so that from Jerusalem all the way around to Illyricum I have fulfilled my ministry of proclaiming the gospel of Christ.

He received the sign (sēmeion | σημεῖον | acc sg neut) of circumcision as a seal of the righteousness that he had by faith while he was still uncircumcised, so that he would be the father of all who believe but have never been circumcised, that they too might have righteousness credited to them.

And the entire assembly fell silent, and listened to Barnabas and Paul recounting all the signs (sēmeia | σημεῖα | acc pl neut) and wonders that God had done through them among the Gentiles.

So they stayed there for a considerable time, speaking out boldly about the Lord, who witnessed to the message of his grace, granting signs (sēmeia | σημεῖα | acc pl neut) and wonders to be done through their hands.

Even Simon himself believed, and after being baptized he stayed constantly with Philip. And seeing signs (sēmeia | σημεῖα | acc pl neut) and great miracles happening, he was amazed.

And with one accord the crowds paid attention to what was being said by Philip as they heard him and saw the signs (sēmeia | σημεῖα | acc pl neut) that he was performing.

He led them out, performing wonders and signs (sēmeia | σημεῖα | acc pl neut) in Egypt and at the Red Sea and in the wilderness for forty years.

And Stephen, full of grace and power, was doing great wonders and signs (sēmeia | σημεῖα | acc pl neut) among the people.