23 Preface كَأَمثالِ اللُّؤلُؤِ المَكنونِYusuf AliLike unto Pearls1 well-guarded.Cf. 52:24, where this description is applied to the youths who serve. See also n. 5058 there. In 56:78 below the adjective maknun is applied to the Qur-ān, “the well-guarded Book”.