TibyanTafsir Ibn Kathir
Ash-Sharh

Ease after Difficulty

﴿ إِنَّ مَعَ ٱلۡعُسۡرِ يُسۡرً۬ا • فَإِنَّ مَعَ ٱلۡعُسۡرِ يُسۡرًا ﴾

(Verily along with every hardship is relief. Veriliy along with every hardship is relief)

Allah informs that with difficulty there is ease, and then he reaffirms this information (by repeating it)