3 verses have
“صَٰدِقِينَ”
in Edition Uthmani / Al-A'raaf (The Heights)
70:7قَالُوٓا۟ أَجِئْتَنَا لِنَعْبُدَ ٱللَّهَ وَحْدَهُۥ وَنَذَرَ مَا كَانَ يَعْبُدُ ءَابَآؤُنَا ۖ فَأْتِنَا بِمَا تَعِدُنَآ إِن كُنتَ مِنَ ٱلصَّٰدِقِينَ
106:7قَالَ إِن كُنتَ جِئْتَ بِـَٔايَةٍۢ فَأْتِ بِهَآ إِن كُنتَ مِنَ ٱلصَّٰدِقِينَ
194:7إِنَّ ٱلَّذِينَ تَدْعُونَ مِن دُونِ ٱللَّهِ عِبَادٌ أَمْثَالُكُمْ ۖ فَٱدْعُوهُمْ فَلْيَسْتَجِيبُوا۟ لَكُمْ إِن كُنتُمْ صَٰدِقِينَ
Support Ayat Al Quran
Those who spend their wealth by night and day, privately and publicly, will receive their reward from their Lord. They have nothing to fear, nor shall they grieve.
The Holy Quran · Al-Baqara (The Cow) · 2:274