Rarely do I post a text-critical note on the biblical text but I think this is important. So here's my take on Psalm 100:3.
ESV Psalm 100:3 Know that the LORD, he is God! It is he who made us, and we are his;
NIV Psalm 100:3 Know that the LORD is God. It is he who made us, and we are his;
NAU Psalm 100:3 Know that the LORD Himself is God; It is He who has made us, and not we ourselves;
Read the article here.