G2589–καρδιογνώστης–kardiognōstēs

And they prayed, and said, Thou, Lord, which knowest the hearts of all men, shew whether of these two thou hast chosen,

καρδιογνῶστα kardiognōsta “knower of the hearts”

And God, which knoweth the hearts, bare them witness, giving them the Holy Ghost, even as he did unto us;

καρδιογνώστης kardiognōstēs “heart-knowing”