Acts 4:11

This(i.e. Jesus) is the stone which was set at nought of you[the builders There is the definite article in the original. The council are fitly called the builders, for on them depended the whole religious and civil government of the people. St Peter, with his mind now enlightened to apply the Scriptures, uses the words of the Psalmist (Psalms 118:22) as spoken prophetically of Christ. Christ had already (Matthew 21:42) applied these words to Himself and to the way in which He was being rejected of the Jews, in the close of one of His parables which the Pharisees felt had been spoken against them.

which is become the head of the corner Christ, now exalted into heaven, is no longer the despised, but has become the most important, stone in the new building of the Christian society, cp. Ephesians 2:20-22. St Peter uses this quotation in his Epistle (1 Peter 2:7), and joins with it a passage (Isaiah 28:16) where the like figure is employed prophetically of the Messiah, "the foundation stone laid in Zion."