[Mat 5:24 NASB] 24 leave your offering there before the altar and go; first[G4413] be reconciled to your brother, and then come and present your offering.
[Mat 6:33 NASB] 33 "But seek first[G4413] His kingdom and His righteousness, and all these things will be added to you.
- His kingdom and His righteousness
[Mat 7:5 NASB] 5 "You hypocrite, first[G4413] take the log out of your own eye, and then you will see clearly to take the speck out of your brother's eye.
- taking the log out of your eye
[Mat 8:21 NASB] 21 Another of the disciples said to Him, "Lord, permit me first[G4413] to go and bury my father."
[Mat 10:2 NASB] 2 Now the names of the twelve apostles are these: The first,[G4413] Simon, who is called Peter, and Andrew his brother; and James the son of Zebedee, and John his brother;
[Mat 12:29, 45 NASB] 29 "Or how can anyone enter the strong man's house and carry off his property, unless he first[G4413] binds the strong [man?] And then he will plunder his house. ... 45 "Then it goes and takes along with it seven other spirits more wicked than itself, and they go in and live there; and the last state of that man becomes worse than the first.[G4413] That is the way it will also be with this evil generation."
- binding the strong man
- having an evil spirit
[Mat 13:30 NASB] 30 'Allow both to grow together until the harvest; and in the time of the harvest I will say to the reapers, "First[G4413] gather up the tares and bind them in bundles to burn them up; but gather the wheat into my barn."'"
[Mat 17:10, 27 NASB] 10 And His disciples asked Him, "Why then do the scribes say that Elijah must come first?"[G4413] ... 27 "However, so that we do not offend them, go to the sea and throw in a hook, and take the first[G4413] fish that comes up; and when you open its mouth, you will find a shekel. Take that and give it to them for you and Me."
[Mat 19:30 NASB] 30 "But many [who are] first[G4413] will be last; and [the] last, first.[G4413]
[Mat 20:8, 10, 16, 27 NASB] 8 "When evening came, the owner of the vineyard said to his foreman, 'Call the laborers and pay them their wages, beginning with the last [group] to the first.'[G4413] ... 10 "When those [hired] first[G4413] came, they thought that they would receive more; but each of them also received a denarius. ... 16 "So the last shall be first,[G4413] and the first[G4413] last." ... 27 and whoever wishes to be first[G4413] among you shall be your slave;
- laborers
- those hired
- the last
- your slave
[Mat 21:28, 31, 36 NASB] 28 "But what do you think? A man had two sons, and he came to the first[G4413] and said, 'Son, go work today in the vineyard.' ... 31 "Which of the two did the will of his father?" They said, "The first."[G4413] Jesus said to them, "Truly I say to you that the tax collectors and prostitutes will get into the kingdom of God before you. ... 36 "Again he sent another group of slaves larger than the first;[G4413] and they did the same thing to them.
- a son
- tax collectors and prostitutes (via Christ's analogy)
[Mat 22:25, 38 NASB] 25 "Now there were seven brothers with us; and the first[G4413] married and died, and having no children left his wife to his brother; ... 38 "This is the great and foremost[G4413] commandment.
- a dead brother
- a commandment
[Mat 23:26 NASB] 26 "You blind Pharisee, first[G4413] clean the inside of the cup and of the dish, so that the outside of it may become clean also.
- cleaning the inside of a cup
[Mat 26:17 NASB] 17 Now on the first[G4413] [day] of Unleavened Bread the disciples came to Jesus and asked, "Where do You want us to prepare for You to eat the Passover?"
- feast of Unleavened Bread (implied 'day')
[Mat 27:64 NASB] 64 "Therefore, give orders for the grave to be made secure until the third day, otherwise His disciples may come and steal Him away and say to the people, 'He has risen from the dead,' and the last deception will be worse than the first."[G4413]
That is just the Gospel of Matthew.
A lot of things and people and actions come first ... it all depends on the context.

[
that was one of those answers that has a double meaning ... snicker.]