Exodus 16 opens in :1 by saying that it was “the fifteenth day of the second month” – i.e., about 6 weeks into the journey of the people of Israel in the Exodus. It is notable that the chapter goes on to say that it was then that the people began to grumble. The journey was not new anymore by that time, the initial “excitement” had worn off, and it was becoming a “grind” already. I believe there is a “heads’ up” in this passage for many of us:
“The fifteenth day of the second month” is often when we get tested – not necessarily that exact number of days, but after some time has passed since we got a special assurance from God, or the “high” of the “revival” or the camp has worn off, when we get home and back into the nitty gritty, every day grind of life. In that time of testing, are we going to remember the lessons we previously learned, or in “the fifteenth day of the second month” are we going to lose our faith and start grumbling, like they did?
I don’t know how far you are into your latest spiritual journey, but if the “luster” of what God last told you has worn off, and you are tempted to doubt or grumble, then keep the faith! It may be “the fifteenth day of the second month” for you!