Translation:

4. There have already come to them Recitals wherein there is (enough) to check (them)

Notes (Tafseer)

5131. The stories of the sins of past generations having been visited with exemplary punishments were already in their possession, and should, if they had been wise, have opened their eyes and checked them in their mad career of sin. Five of these stories are again referred to later in this Sura by way of illustration.