The most beautiful designation of the word elect in the Bible is given to Jesus Christ, as the elect, chosen one.
1 Peter 2:6 Wherefore also it is contained in the scripture, Behold, I lay in Sion a chief corner stone, elect, precious: and he that believeth on him shall not be confounded.
Christ, as the precious, chief corner stone, is the only one to believe on!
Isaiah also prophesies and designates, Jesus Christ as the elect.
Isaiah 42:1-3 Behold my servant, whom I uphold; mine elect, in whom my soul delighteth; I have put my spirit upon him: he shall bring forth judgment to the Gentiles. He shall not cry, nor lift up, nor cause his voice to be heard in the street. A bruised reed shall he not break, and the smoking flax shall he not quench: he shall bring forth judgment unto truth.
The cross-reference is found in Matthew 12.
Matthew 12:17-20 That it might be fulfilled which was spoken by Esaias the prophet, saying, Behold my servant, whom I have chosen; my beloved, in whom my soul is well pleased: I will put my spirit upon him, and he shall shew judgment to the Gentiles. He shall not strive, nor cry; neither shall any man hear his voice in the streets. A bruised reed shall he not break, and smoking flax shall he not quench, till he send forth judgment unto victory.
Christ is the chosen, beloved, precious, elect, chief cornerstone!