Surah 55. Ar-Rahman, Ayah 50

The "two springs" of paradise call to mind the "two seas" spoken of in {18:60-61}, which, according to Baydawi, symbolize the two sources or streams of knowledge accessible to man: the one obtained through the observation and intellectual analysis of external phenomena ('ilm az-zahir), and the other through inward, mystic insight ('ilm al-batin).

Two Springs, for the same reasons as there will be two Gardens. See last note.