Who Searches The Heart And Mind?

Question 1

10I, Jehovah, am searching the heart, Examining the innermost thoughts, To give to each one according to his ways, According to the fruitage of his works.

Answer 1

Jeremiah 17:10 NWT

Question 2

23And I will kill her children with deadly plague, so that all the congregations will know that I am the one who searches the innermost thoughts and hearts, and I will give to you individually according to your deeds.

Answer 2

Revelation 2:23 NWT