1. Hebrews 9:27; And just as it is appointed for man to die once, and after that comes judgment,
   
   

2. John 12:25; Whoever loves his life loses it, and whoever hates his life in this world will keep it for eternal life.
    

3. Luke 16:19-31; There was a rich man who was clothed in purple and fine linen and who feasted sumptuously every day. And at his gate was laid a poor man named Lazarus, covered with sores, who desired to be fed with what fell from the rich man's table. Moreover, even the dogs came and licked his sores. The poor man died and was carried by the angels to Abraham's side. The rich man also died and was buried, and in Hades, being in torment, he lifted up his eyes and saw Abraham far off and Lazarus at his side. ...
    

4. 1 Peter 3:18-19; For Christ also suffered once for sins, the righteous for the unrighteous, that he might bring us to God, being put to death in the flesh but made alive in the spirit, in which he went and proclaimed to the spirits in prison,
    

5. Luke 12:15; 15 Then he said to them, “Watch out! Be on your guard against all kinds of greed; life does not consist in an abundance of possessions.”

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Notice in each of the above verses, there is only one life mentioned.  

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1. "for man to die once"

2. "loves his life"  (one life - the verse could have read 'lives'.

3. "the poor man died"  (It talks only about one life)

4. "For Christ also suffered once"  (Christ only lived one life)

5. "life does not consist....  (if there were more than one life "life" would be in the plural)

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