Search the Bible for first in KJV

Genesis 48:14 (KJV)
And Israel stretched out his right hand, and laid it upon Ephraim's head, who was the younger, and his left hand upon Manasseh's head, guiding his hands wittingly; for Manasseh was the firstborn.

Genesis 48:18 (KJV)
And Joseph said unto his father, Not so, my father: for this is the firstborn; put thy right hand upon his head.

Genesis 49:3 (KJV)
Reuben, thou art my firstborn, my might, and the beginning of my strength, the excellency of dignity, and the excellency of power:

Exodus 4:8 (KJV)
And it shall come to pass, if they will not believe thee, neither hearken to the voice of the first sign, that they will believe the voice of the latter sign.

Exodus 4:22 (KJV)
And thou shalt say unto Pharaoh, Thus saith the LORD, Israel is my son, even my firstborn:

Exodus 4:23 (KJV)
And I say unto thee, Let my son go, that he may serve me: and if thou refuse to let him go, behold, I will slay thy son, even thy firstborn.

Exodus 6:14 (KJV)
These be the heads of their fathers' houses: The sons of Reuben the firstborn of Israel; Hanoch, and Pallu, Hezron, and Carmi: these be the families of Reuben.

Exodus 11:5 (KJV)
And all the firstborn in the land of Egypt shall die, from the first born of Pharaoh that sitteth upon his throne, even unto the firstborn of the maidservant that is behind the mill; and all the firstborn of beasts.

Exodus 12:2 (KJV)
This month shall be unto you the beginning of months: it shall be the first month of the year to you.

Exodus 12:5 (KJV)
Your lamb shall be without blemish, a male of the first year: ye shall take it out from the sheep, or from the goats:

Exodus 12:12 (KJV)
For I will pass through the land of Egypt this night, and will smite all the firstborn in the land of Egypt, both man and beast; and against all the gods of Egypt I will execute judgment: I am the LORD.

Exodus 12:15 (KJV)
Seven days shall ye eat unleavened bread; even the first day ye shall put away leaven out of your houses: for whosoever eateth leavened bread from the first day until the seventh day, that soul shall be cut off from Israel.

Exodus 12:16 (KJV)
And in the first day there shall be an holy convocation, and in the seventh day there shall be an holy convocation to you; no manner of work shall be done in them, save that which every man must eat, that only may be done of you.

Exodus 12:18 (KJV)
In the first month, on the fourteenth day of the month at even, ye shall eat unleavened bread, until the one and twentieth day of the month at even.

Exodus 12:29 (KJV)
And it came to pass, that at midnight the LORD smote all the firstborn in the land of Egypt, from the firstborn of Pharaoh that sat on his throne unto the firstborn of the captive that was in the dungeon; and all the firstborn of cattle.

Exodus 13:2 (KJV)
Sanctify unto me all the firstborn, whatsoever openeth the womb among the children of Israel, both of man and of beast: it is mine.

Exodus 13:12 (KJV)
That thou shalt set apart unto the LORD all that openeth the matrix, and every firstling that cometh of a beast which thou hast; the males shall be the LORD's.

Exodus 13:13 (KJV)
And every firstling of an ass thou shalt redeem with a lamb; and if thou wilt not redeem it, then thou shalt break his neck: and all the firstborn of man among thy children shalt thou redeem.

Exodus 13:15 (KJV)
And it came to pass, when Pharaoh would hardly let us go, that the LORD slew all the firstborn in the land of Egypt, both the firstborn of man, and the firstborn of beast: therefore I sacrifice to the LORD all that openeth the matrix, being males; but all the firstborn of my children I redeem.

Exodus 22:29 (KJV)
Thou shalt not delay to offer the first of thy ripe fruits, and of thy liquors: the firstborn of thy sons shalt thou give unto me.

Exodus 23:16 (KJV)
And the feast of harvest, the firstfruits of thy labors, which thou hast sown in the field: and the feast of ingathering, which is in the end of the year, when thou hast gathered in thy labors out of the field.

Exodus 23:19 (KJV)
The first of the firstfruits of thy land thou shalt bring into the house of the LORD thy God. Thou shalt not seethe a kid in his mother's milk.

Exodus 28:17 (KJV)
And thou shalt set in it settings of stones, even four rows of stones: the first row shall be a sardius, a topaz, and a carbuncle: this shall be the first row.

Exodus 29:38 (KJV)
Now this is that which thou shalt offer upon the altar; two lambs of the first year day by day continually.

Exodus 34:1 (KJV)
And the LORD said unto Moses, Hew thee two tables of stone like unto the first: and I will write upon these tables the words that were in the first tables, which thou brakest.

Exodus 34:4 (KJV)
And he hewed two tables of stone like unto the first; and Moses rose up early in the morning, and went up unto mount Sinai, as the LORD had commanded him, and took in his hand the two tables of stone.

Exodus 34:19 (KJV)
All that openeth the matrix is mine; and every firstling among thy cattle, whether ox or sheep, that is male.

Exodus 34:20 (KJV)
But the firstling of an ass thou shalt redeem with a lamb: and if thou redeem him not, then shalt thou break his neck. All the firstborn of thy sons thou shalt redeem. And none shall appear before me empty.

Exodus 34:22 (KJV)
And thou shalt observe the feast of weeks, of the firstfruits of wheat harvest, and the feast of ingathering at the year's end.

Exodus 34:26 (KJV)
The first of the firstfruits of thy land thou shalt bring unto the house of the LORD thy God. Thou shalt not seethe a kid in his mother's milk.