I Corinthians 10:5-12 (8th Tuesday after Pentecost)
BRETHREN, nevertheless with most of them God was not pleased; for they were overthrown in the wilderness. Now these things are warnings for us, not to desire evil as they did. Do not be idolaters as some of them were; as it is written, "The people sat down to eat and drink and rose up to dance." We must not indulge in immorality as some of them did, and twenty-three thousand fell in a single day. We must not put the Lord to the test, as some of them did and were destroyed by serpents; nor grumble, as some of them did and were destroyed by the Destroyer. Now these things happened to them as a warning, but they were written down for our instruction, upon whom the end of the ages has come. Therefore let any one who thinks that he stands take heed lest he fall.