The Quran

وَنُفِخَ فِي الصّورِ فَصَعِقَ مَن فِي السَّماواتِ وَمَن فِي الأَرضِ إِلّا مَن شاءَ اللَّهُ ۖ ثُمَّ نُفِخَ فيهِ أُخرىٰ فَإِذا هُم قِيامٌ يَنظُرونَ

Muhammad Asad

And [on that Day,] the trumpet [of judgment] will be sounded, and all [creatures] that are in the heavens and all that are on earth will fall down senseless, unless they be such as God wills [to exempt].¹ And then it will sound again - and lo! standing [before the Seat of Judgment], they will begin to see [the truth]!²

As is evident from 27:89, the above is an allusion to the unbroken spiritual life in this world - and, therefore, happiness in the hereafter - of those who have attained to faith and have done righteous deeds. Cf. 21:103 - "the supreme awesomeness [of the Day of Resurrection] will cause them no grief".
Cf. 37:19.