The Women
أَلَمْ تَرَ إِلَى ٱلَّذِينَ أُوتُوا۟ نَصِيبًا مِّنَ ٱلْكِتَـٰبِ يُؤْمِنُونَ بِٱلْجِبْتِ وَٱلطَّـٰغُوتِ وَيَقُولُونَ لِلَّذِينَ كَفَرُوا۟ هَـٰٓؤُلَآءِ أَهْدَىٰ مِنَ ٱلَّذِينَ ءَامَنُوا۟ سَبِيلًا
Have you not seen those who were given a portion of the Scripture, who believe in superstition and false objects of worship and say about the disbelievers, "These are better guided than the believers as to the way"?
Nearby ayahs help place verse 4:51 in sequence and meaning.
أَلَمْ تَرَ إِلَى ٱلَّذِينَ يُزَكُّونَ أَنفُسَهُم ۚ بَلِ ٱللَّهُ يُزَكِّى مَن يَشَآءُ وَلَا يُظْلَمُونَ فَتِيلًا
Have you not seen those who claim themselves to be pure? Rather, Allah purifies whom He wills, and injustice is not done to them, [even] as much as a thread [inside a date seed].
ٱنظُرْ كَيْفَ يَفْتَرُونَ عَلَى ٱللَّهِ ٱلْكَذِبَ ۖ وَكَفَىٰ بِهِۦٓ إِثْمًا مُّبِينًا
Look how they invent about Allah untruth, and sufficient is that as a manifest sin.
أُو۟لَـٰٓئِكَ ٱلَّذِينَ لَعَنَهُمُ ٱللَّهُ ۖ وَمَن يَلْعَنِ ٱللَّهُ فَلَن تَجِدَ لَهُۥ نَصِيرًا
Those are the ones whom Allah has cursed; and he whom Allah curses - never will you find for him a helper.
أَمْ لَهُمْ نَصِيبٌ مِّنَ ٱلْمُلْكِ فَإِذًا لَّا يُؤْتُونَ ٱلنَّاسَ نَقِيرًا
Or have they a share of dominion? Then [if that were so], they would not give the people [even as much as] the speck on a date seed.