Learn more about the Israelites exit from Egypt
Having looked today at the ungratitude of the Israelites after leaving Egypt where they had been slaves, look up exactly what happened when they finally managed to extricate themselves from their oppressors:
You could also look up my website (sharonswain.com) and the follow up thoughts for Wednesday 22nd July, about the wildernesses in Israel, including the Wilderness of Zin (or Sin as it is written in today's reading).