But really, this hearkens back to Israel in the desert when they were told to collect just enough for the day and they disobeyed because they worried He might not not send enough the following day.
That's an excellent point, sister. I think it's precisely what the entire Manna from heaven and 7th Day Sabbath commandment was intended to build within the Israelites: A trust in God's faithfulness, rather than in the power of the flesh.
I'm going to have to remember this parallel. As Paul taught, the things that happened to them in the wilderness were examples to us, that we keep our hope continually in God and not fall away into distrust, and then sin and rebellion.