Mark 13:20

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.

Matthew 24:22

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.

Romans 11:5-7

So, now also, there is a small minority which has been selected by God's unearned favor [i.e., to be saved].

Romans 11:23-24

And these Jews also will be grafted [back] in [to the olive tree] if they do not continue in their lack of faith [in Christ], because God is able to graft them back in again.

Romans 11:28-32

Now in response to the [proclamation of the] good news [about Christ], the Jews became [God's] enemies for the sake of you [Gentiles]. But concerning [God's] select people, these Jews became [God's] dearly loved ones for the sake of their forefathers [i.e, who believed God's promises regarding their descendants].

Treasury of Scripture Knowledge

Summary

And except that the Lord had shortened those days, no flesh should be saved: but for the elect's sake, whom he hath chosen, he hath shortened the days.

Bible References

For

Matthew 24:22
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.
Romans 11:5
So, now also, there is a small minority which has been selected by God's unearned favor [i.e., to be saved].