"The thing that the Prophet most liked to conceal himself behind when relieving himself was a hillock or a stand of date-palm trees." (Using translation from Ibn Mājah 340)
«كَانَ أَحَبَّ مَا اسْتَتَرَ بِهِ النَّبِيُّ ﷺ لِحَاجَةٍ هَدَفٌ أَوْ حَائِشُ نَخْلٍ»