37:151
أَلَآ إِنَّهُم مِّنْ إِفْكِهِمْ لَيَقُولُونَ ١٥١
Saheeh International
Unquestionably, it is out of their [invented] falsehood that they say,
Tafsir of "Ibn Kathir" (English)
أَلَا إِنَّهُم مِّنْ إِفْكِهِمْVerily, it is of their falsehood,means, it is a part of the lies they tell.لَيَقُولُونَ