ذَٰلِكَ بِأَنَّهُمْ قَالُوا لِلَّذِينَ كَرِهُوا مَا نَزَّلَ ٱللَّهُ سَنُطِيعُكُمْ فِى بَعْضِ ٱلْأَمْرِ ۖ وَٱللَّهُ يَعْلَمُ إِسْرَارَهُمْ

Thalika bi-annahum qaloo lillatheenakarihoo ma nazzala Allahu sanuteeAAukum feebaAAdi al-amri wallahu yaAAlamu israrahum

That is because they said to those who disliked what Allāh sent down, "We will obey you in part of the matter." And Allāh knows what they conceal.