16:38
وَ أَقْسَمُ وا۟ بِ ٱللَّهِ جَهْدَ أَيْمَٰنِ هِمْ لَا يَبْعَثُ ٱللَّهُ مَن يَمُوتُ بَلَىٰ وَعْدًا عَلَيْ هِ حَقًّا وَ لَٰكِنَّ أَكْثَرَ ٱل نَّاسِ لَا يَعْلَمُ ونَ
And they swear by Allah their strongest oaths [that] Allah will not resurrect one who dies. But yes - [it is] a true promise [binding] upon Him, but most of the people do not know.
24:53
وَ أَقْسَمُ وا۟ بِ ٱللَّهِ جَهْدَ أَيْمَٰنِ هِمْ لَ ئِنْ أَمَرْ تَ هُمْ لَ يَخْرُجُ نَّ قُل لَّا تُقْسِمُ وا۟ طَاعَةٌ مَّعْرُوفَةٌ إِنَّ ٱللَّهَ خَبِيرٌۢ بِ مَا تَعْمَلُ ونَ
And they swear by Allah their strongest oaths that if you ordered them, they would go forth [in Allah 's cause]. Say, "Do not swear. [Such] obedience is known. Indeed, Allah is Acquainted with that which you do."
35:42
وَ أَقْسَمُ وا۟ بِ ٱللَّهِ جَهْدَ أَيْمَٰنِ هِمْ لَ ئِن جَآءَ هُمْ نَذِيرٌ لَّ يَكُونُ نَّ أَهْدَىٰ مِنْ إِحْدَى ٱلْ أُمَمِ فَ لَمَّا جَآءَ هُمْ نَذِيرٌ مَّا زَادَ هُمْ إِلَّا نُفُورًا
And they swore by Allah their strongest oaths that if a warner came to them, they would be more guided than [any] one of the [previous] nations. But when a warner came to them, it did not increase them except in aversion.
5:53
وَ يَقُولُ ٱلَّذِينَ ءَامَنُ وٓا۟ أَ هَٰٓؤُلَآءِ ٱلَّذِينَ أَقْسَمُ وا۟ بِ ٱللَّهِ جَهْدَ أَيْمَٰنِ هِمْ إِنَّ هُمْ لَ مَعَ كُمْ حَبِطَتْ أَعْمَٰلُ هُمْ فَ أَصْبَحُ وا۟ خَٰسِرِينَ
And those who believe will say, "Are these the ones who swore by Allah their strongest oaths that indeed they were with you?" Their deeds have become worthless, and they have become losers.
6:109
وَ أَقْسَمُ وا۟ بِ ٱللَّهِ جَهْدَ أَيْمَٰنِ هِمْ لَ ئِن جَآءَتْ هُمْ ءَايَةٌ لَّ يُؤْمِنُ نَّ بِ هَا قُلْ إِنَّ مَا ٱلْ ءَايَٰتُ عِندَ ٱللَّهِ وَ مَا يُشْعِرُ كُمْ أَنَّ هَآ إِذَا جَآءَتْ لَا يُؤْمِنُ ونَ
And they swear by Allah their strongest oaths that if a sign came to them, they would surely believe in it. Say, "The signs are only with Allah." And what will make you perceive that even if a sign came, they would not believe.