New Revised Standard Version
And if those days had not been cut short, no one would be saved; but for the sake of the elect those days will be cut short.

Contemporary English Version
If God doesn't make the time shorter, no one will be left alive. But because of God's chosen ones, he will make the time shorter.

New American Bible
And if those days had not been shortened, no one would be saved; but for the sake of the elect they will be shortened.

Douay-Rheims Bible
And unless those days had been shortened, no flesh should be saved: but for the sake of the elect those days shall be shortened.

And unless those days had been shortened, no flesh should be saved: but for the sake of the elect those days shall be shortened.

except.

Mark 13:20 And unless the Lord had shortened the days, no flesh should be saved: but, for the sake of the elect which he hath chosen, he hath shortened the days.

for.

Isaiah 6:13 And there shall be still a tithing therein, and she shall turn, and shall be made a show as a turpentine tree, and as an oak that spreadeth its branches: that which shall stand therein, shall be a holy seed.

Isaiah 65:8,9 Thus saith the Lord: As if a grain be found in a cluster, and it be said: Destroy it not, because it is a blessing: so will I do for the sake of my servants, that I may not destroy the whole. . . .

Zechariah 13:8 And there shall be in all the earth, saith the Lord, two parts in it shall be scattered, and shall perish: but the third part shall be left therein.

Zechariah 14:2 And I will gather all nations to Jerusalem to battle, and the city shall be taken, and the houses shall be rifled, and the women shall be defiled: and half of the city shall go forth into captivity, and the rest of the people shall not be taken away out of the city.

Romans 9:11 For when the children were not yet born, nor had done any good or evil (that the purpose of God according to election might stand):

Romans 11:25-31 For I would not have you ignorant, brethren, of this mystery (lest you should be wise in your own conceits) that blindness in part has happened in Israel, until the fulness of the Gentiles should come in. . . .

2 Timothy 2:10 Therefore I endure all things for the sake of the elect, that they also may obtain the salvation which is in Christ Jesus, with heavenly glory.