Surah Al-Baqarah — Ayah 103 (2:103)
وَلَوۡ أَنَّهُمۡ ءَامَنُواْ وَٱتَّقَوۡاْ لَمَثُوبَةٞ مِّنۡ عِندِ ٱللَّهِ خَيۡرٞۚ لَّوۡ كَانُواْ يَعۡلَمُونَ ١٠٣
English translation (Saheeh International)
And if they had believed and feared Allāh, then the reward from Allāh would have been [far] better, if they only knew.
Brief commentary
If the Jews had really had faith in Allah, and been mindful to obey His sacred law and not rebel, His reward would have been far better for them, if they only knew.