steadfastness in da'wah (preaching)

وَتَرَكْنَا عَلَيْهِ فِى ٱلْـَٔاخِرِينَ

And left for him [favorable mention] among later generations:

سَلَـٰمٌ عَلَىٰ نُوحٍ فِى ٱلْعَـٰلَمِينَ

"Peace upon Noah among the worlds."