Exodus 4:22

Then say to Pharaoh, 'This is what the LORD says: Israel is my firstborn son,

(New International Version)

'Then you shall say to Pharaoh, 'Thus says the LORD, 'Israel is My son, My firstborn.

(New American Standard Bible)

And thou shalt say unto Pharaoh, Thus saith the LORD, Israel is my son, even my firstborn:

(King James Version)