3 When his master saw that the LORD was with him and that the LORD gave him success in everything he did,

Read Genesis 39:3 Using Other Translations

And his master saw that the LORD was with him, and that the LORD made all that he did to prosper in his hand.
His master saw that the LORD was with him and that the LORD caused all that he did to succeed in his hands.
Potiphar noticed this and realized that the LORD was with Joseph, giving him success in everything he did.