Tafsir of Al-Balad 90:11

The Encouragement to traverse upon the Path of Goodness Allah said,

فﻼ اقتحم العقبة

But he has not attempted to pass on the path that is steep. Ibn Zayd said, "This means, will he not traverse upon the path which contains salvation and good. Then He explains this path by His saying,

وما أدراك ما العقبة