Sa’id ibn Sulayman reported: I never heard Malik, may Allah have mercy on him, issue a religious verdict on anything but that he would recite this verse, “Verily, we only consider it speculation and we are not certain.” (45:32)
Source: Ḥilyat al-Awliyā’ 9117
عن سَعِيد بْن سُلَيْمَان قَالَ قَلَّمَا سَمِعْتُ مَالِكًا رحمه الله يُفْتِي بِشَيْءٍ إِلَّا تَلَا هَذِهِ الْآيَةَ إِنَّ نَظُنُّ إِلَّا ظَنًّا وَمَا نَحْنُ بِمُسْتَيْقِنِين
9117 حلية الأولياء وطبقات الأصفياء