This photo of granite rocks was made at Jebel Musa (traditional Mount Sinai) in the Sinai Peninsula. It reminded me of several Old Testament references to the rock from which the Lord provided water for the Israelites in the wilderness.
He opened the rock, and water gushed out; it flowed through the desert like a river. (Psalm 105:41 ESV)
He struck the rock so that water gushed out and streams overflowed. Can he also give bread or provide meat for his people?” (Psalm 78:20 ESV)
You may be able to use this photo as an illustration in one of your Bible class lessons or sermons. Click on the photo for a larger image.