1 Corinthians 10:6

Now these things were our examples, to the intent we should not lust after evil things, as they also lusted. [Having shown that the Israelites lost their inheritance despite the fact that they were prepared, sustained and strengthened by the same Christ and practically the same ordinances enjoyed by the Christian, Paul proceeds to show their perfectness as examples to the Corinthians in that they fell by the five sins, viz.: lust, idolatry, fornication, tempting Christ, murmuring, which were the besetting sins of the Corinthians--and of all succeeding generations. In the case of Israel the punishment was directly and visibly connected with the sin, that their history might be used to instruct future generations; for in this life punishment is not, as a rule, summarily and immediately meted out to sinners. In fact, if we judge by appearances only, we might sometimes even think that God rewarded crime and set a premium on sin. The Scripture records show that such appearances are deceptive, and that God's punishments are sure, though they may be long delayed. Israel lusted for what God withheld and murmured at what he provided (Numbers 11:4-34). As Israel looked back with regret on the flesh and the fish, the cucumbers, melons, leeks, onions and garlic which they had left behind in Egypt, so the Corinthians were disposed to go back into the old life and heap up to themselves philosophical teachers, attend idolatrous feasts, etc.]