20 The Gerasenes could not bear the presence of Christ; these, worse than the Gerasenes, cannot endure the praises of Christ. They see boys singing of the glory of Christ, for it is written: “Out of the mouths of babes and sucklings You have perfected praise.” They mock at their tender age, so full of faith, and say: “Behold, why do they cry out?” But Christ answers them: “If these should hold their peace, the stones will cry out,” that is, the stronger will cry out, both youths and the more mature will cry out, and old men will cry out; these stones now firmly laid upon that stone of which it is written: “The stone which the builders rejected has become the head of the corner.”
Source: Sermon against Auxentius (New Advent)