Surah 87. Al-Ala, Ayah 9

Thus Baghawi, as well as Razi in one of his alternative interpretations of this phrase.

This is not so strong as the Biblical phrase, "Cast not pearls before swine" (Man. vii. 6). The cases where admonition does produce spiritual profit and where it does not, are mentioned below in verses 10 and 11-13 respectively. Allah's Message should be proclaimed to all: but particular and personal admonitions are also due to those who attend and in whose hearts is the fear of Allah; in the case of those who run away from it and dishonour it, such particular and personal admonition is useless. They are the unfortunate ones who prepare their own ruin.