Psalm 78:19-20

They spoke against God; they said, "Can God really spread a table in the wilderness? True, he struck the rock, and water gushed out, streams flowed abundantly, but can he also give us bread? Can he supply meat for his people?"

They spoke against God 
Numbers 21:4-5  They traveled from Mount Hor along the route to the Red Sea, to go around Edom. But the people grew impatient on the way; they spoke against God and against Moses, and said, "Why have you brought us up out of Egypt to die in the wilderness? There is no bread! There is no water! And we detest this miserable food!" 

True, he struck the rock, and water gushed out 
Numbers 20:11  Then Moses raised his arm and struck the rock twice with his staff. Water gushed out, and the community and their livestock drank.
Isaiah 35:6-7  Then will the lame leap like deer, and the mute tongue shout for joy. Water will gush forth in the wilderness and streams in the desert. The burning sand will become a pool, the thirsty ground bubbling springs. In the haunts where jackals once lay, grass and reeds and papyrus will grow.

Can he supply meat for his people? 
Numbers 11:18-20  "Tell the people: 'Consecrate yourselves in preparation for tomorrow, when you will eat meat. The LORD heard you when you wailed, "If only we had meat to eat! We were better off in Egypt!" Now the LORD will give you meat, and you will eat it. You will not eat it for just one day, or two days, or five, ten or twenty days, but for a whole month--until it comes out of your nostrils and you loath it--because you have rejected the LORD, who is among you, and have wailed before him, saying, "Why did we ever leave Egypt?" ' "

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
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