To urinate beside one‘s companion while screened by a wall

Narrated Hudhaifa':

The Prophet and I walked till we reached the dumps of some people. He stood, as any one of you stands, behind a wall and urinated. I went away, but he beckoned me to come. So I approached him and stood near his back till he finished.

حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، قَالَ حَدَّثَنَا جَرِيرٌ، عَنْ مَنْصُورٍ، عَنْ أَبِي وَائِلٍ، عَنْ حُذَيْفَةَ، قَالَ رَأَيْتُنِي أَنَا وَالنَّبِيُّ، ﷺ نَتَمَاشَى، فَأَتَى سُبَاطَةَ قَوْمٍ خَلْفَ حَائِطٍ، فَقَامَ كَمَا يَقُومُ أَحَدُكُمْ فَبَالَ، فَانْتَبَذْتُ مِنْهُ، فَأَشَارَ إِلَىَّ فَجِئْتُهُ، فَقُمْتُ عِنْدَ عَقِبِهِ حَتَّى فَرَغَ.