Tafsir of As-Saffat 37:148

فامنوا

And they believed; means, these people to whom Yunus, peace be upon him, had been sent all believed.

فمتعناهم إلى حين

so We gave them enjoyment for a while. means, until the time of their appointed end. This is like the Ayah,

فلوﻻ كانت قرية ءامنت فنفعها إيمانها إﻻ قوم يونس لما ءامنوا كشفنا عنهم عذاب الخزى فى الحيوة الدنيا ومتعناهم إلى حين

Was there any town (community) that believed, and its faith (at that moment) saved it -- except the people of Yunus; when they believed, We removed from them the torment of disgrace in the life of the (present) world, and permitted them to enjoy for a while. (10:98)