Surah Sad, ayah 42

ٱرۡكُضۡ بِرِجۡلِكَۖ هَٰذَا مُغۡتَسَلُۢ بَارِدٞ وَشَرَابٞ ٤٢

Urkud birijlika hādhā mughtasalu bāridun washarāb

[So he was told], "Strike [the ground] with your foot; this is a [spring for a] cool bath and drink."