THE HEBREW WORD FIRSTFRUITS (BIKKURIM) IS LINKED WITH FIRSTBORN (BEKOR)

Exodus 4:22 And you shall say unto Pharaoh, Thus says the LORD, Israel is my son, even my firstborn <01060>:

Exodus 23:19 The first of the firstfruits <01061> of thy land you shall bring into the house of the LORD thy God …