وَالدَّلِيلِ عَلَى أَنَّ الْوُقُوفَ مُدَّةً طَوِيلَةً انْتِظَارَ سَلَامِ الْمُصَلِّي خَيْرٌ مِنَ الْمُرُورِ بَيْنَ يَدَيِ الْمُصَلِّي
And the explanation of the evidence that it is better to stand for a long time waiting for the praying person to finish his prayer rather than passing in front of him.