The answer is: From a rock

Exo 17:1-7

In the desert, where even the smallest sip of water is life-saving, the Israelites found themselves in a critical situation, clamoring for sustenance. The moment demanded not just survival but faith and obedience. Moses, led by divine instruction, struck a rock and brought forth water for the people. This remarkable act is more than a mere magic trick; it's a profound lesson in leadership and reliance on the unseen.

Now, it’s fascinating to note the repetition of this rock motif in the Bible. In the New Testament, Paul mentions that “the rock was Christ” (1 Corinthians 10:4), creating a duality of understanding that transcends time, showing how nourishment and sustenance flow not just in the physical but through spiritual means as well. The rock symbolizes strength and reliability—the cornerstone, as it were, of faith itself.

Moreover, interestingly, many interpretations highlight that this event underscores the serious consequences of questioning divine provision. Earlier, too, in Exodus 15, when the Israelites faced bitter waters, God transformed them into drinkable water at Marah, emphasizing God's responsiveness to the needs of the faithful. These stories are collectively interwoven, illustrating that earthly challenges often spark significant growth and revelation.

So, while a dry and barren desert seems stark, it holds a deep well of meaning that cascades through history, continuously guiding seekers toward hope and divine provision in their own “desert experiences.”