And we [ourselves] sailed away from Philippi after the Festival of Unleavened Bread [Note: This was the Jewish feast commemorating deliverance from Egyptian bondage], and five days later [we] joined them at Troas [i.e., the seven men mentioned in verses

For just like Jonah was in the stomach of the huge fish for three days and nights, so the Son of man will be in the heart of the earth [i.e., the cave-tomb] for three days and nights.

And if those days had not been as short as they were no one would have been saved [i.e., from the devastating destruction]. But for the sake of the elect [i.e., God's people], those days will be short.

There will be great trouble during those days, such as had never been from the beginning of God's creation until the present, or even will be [in the days to come].

And if the Lord had not kept those days as short as they were, no one would have been saved [i.e., from the devastating destruction]. But for the sake of the elect [i.e., God's people], whom He chose, He kept those days short.

Now the Passover Festival and the Festival of Unleavened Bread were held two days later. [Note: This was the annual Jewish Festival week commemorating Israel's deliverance from Egyptian bondage under Moses' leadership. The unleavened bread was specially baked bread containing no yeast, which was eaten for seven days as part of the celebration]. And the leading priests and experts in the law of Moses were looking for a way to take Jesus by trickery and kill Him.

"And just as it happened in the days of Noah, so it will be in the days of the Son of man.