﴿ قُلْ يَٰٓأَيُّهَا ٱلَّذِينَ هَادُوٓا۟ إِن زَعَمْتُمْ أَنَّكُمْ أَوْلِيَآءُ لِلَّهِ مِن دُونِ ٱلنَّاسِ فَتَمَنَّوُا۟ ٱلْمَوْتَ إِن كُنتُمْ صَٰدِقِينَ ﴾

“Say: "O you who follow the Jewish faith! If you claim that you [alone] are close to God, to the exclusion of all other people, then you should be longing for death - if what you say is true!"”

Say ‘O you of Jewry if you claim that you are the favoured friends of God to the exclusion of other people then long for death if you are truthful’ in kuntum sādiqīna is semantically connected to tamannū ‘long for’; as for the two conditions the first is dependent on the second that is to say if you are truthful in your claim that you are the favoured friends of God and given that such a friend would prefer the Hereafter to this world and that it the Hereafter begins at death then long for it.