This hadith is narrated by 'Ubaidullah b. Mu'adh with the same chain of transmitters (but for the words) that he (the Prophet) said:

Cleanse yourself with it, and he covered (his face on account of shyness).

وَحَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا شُعْبَةُ، فِي هَذَا الإِسْنَادِ نَحْوَهُ وَقَالَ قَالَ ‏

‏ سُبْحَانَ اللَّهِ تَطَهَّرِي بِهَا ‏

‏ ‏.‏ وَاسْتَتَرَ ‏.‏