وَإِذَا جَآءُوكُمْ قَالُوٓا۟ ءَامَنَّا وَقَد دَّخَلُوا۟ بِٱلْكُفْرِ وَهُمْ قَدْ خَرَجُوا۟ بِهِۦ ۚ وَٱللَّهُ أَعْلَمُ بِمَا كَانُوا۟ يَكْتُمُونَ
And when they come to you, they say, "We believe." But they have entered with disbelief [in their hearts], and they have certainly left with it. And Allah is most knowing of what they were concealing.
(When they) i.e. the lowly among the Jews; and it is also said this means the hypocrites (come unto you (Muslims), they say: We believe) in your traits and description which we find in our Scripture; (but they came in disbelief) they secretly disbelieve (and they went out in the same) disbelieving inwardly; (and Allah knoweth best what they were hiding) of disbelief.