'Chosen One' in the Bible

Then a voice came out of the cloud and said, "This is my Son, my Chosen One; continue to listen to Him!"

Meanwhile, the people stood looking on. Even the members of the council were scoffing at Him and saying, "He saved others, let Him now save Himself, if He really is the Christ of God, His Chosen One!"

What are we then to conclude? Israel has failed to obtain what it is still in search for, but His chosen ones have obtained it. The rest have become insensible to it,