The Letter Sad 38:42. Juz 23, page 455.
ٱرْكُضْ بِرِجْلِكَ ۖ هَـٰذَا مُغْتَسَلٌۢ بَارِدٌ وَشَرَابٌ٤٢(And it was said unto him): Strike the ground with thy foot. This (spring) is a cool bath and a refreshing drink.
Sad 38:42, translated by Marmaduke Pickthall