Then it goes and takes along seven other spirits more evil than itself, — seven of them! — and after going in they settle down to live there. So the last state of that person has become worse than the first.” (prōtōn | πρώτων | gen pl neut)

This registration first (prōtē | πρώτη | nom sg fem) took place while Quirinius was governing Syria.

Now when Jesus arose early on the first (prōtē | πρώτῃ | dat sg fem) day of the week, he appeared first to Mary Magdalene, from whom he had cast out seven demons.

And on the first (prōtē | πρώτῃ | dat sg fem) day of Unleavened Bread, when people were slaughtering the Passover lamb, his disciples said to him, “Where do you want us to go and prepare for you to eat the Passover?”

Jesus answered, “The most important (prōtē | πρώτη | nom sg fem) is, ‘Hear, Israel, the Lord our God, the Lord is one;

And one of the scribes came up and heard them disputing. Seeing how well Jesus had answered them, he put this question to him: “Which commandment is the most important (prōtē | πρώτη | nom sg fem) of all?”

There were seven brothers; the first (prōtos | πρῶτος | nom sg masc) took a wife, and when he died he left no offspring.

and whoever would be first (prōtos | πρῶτος | nom sg masc) among you must be servant of all.

But many who are first (prōtoi | πρῶτοι | nom pl masc) will be last, and the last will be first.” (prōtoi | πρῶτοι | nom pl masc)

And sitting down, he called the twelve and said to them, “If anyone would be first (prōtos | πρῶτος | nom sg masc), he must be last of all and servant of all.”