SEV Biblia, Chapter 6:19
Y de todo lo que vive, de toda carne, dos de cada uno meterás en el arca, para que tengan vida contigo; macho y hembra serán.
Clarke's Bible Commentary - Genesis 6:19
Verse 19. To keep them alive] God might have destroyed all the animal creation, and created others to occupy the new world, but he chose rather to preserve those already created. The Creator and Preserver of the universe does nothing but what is essentially necessary to be done. Nothing should be wantonly wasted; nor should power or skill be lavished where no necessity exists; and yet it required more means and economy to preserve the old than to have created new ones. Such respect has God to the work of his hands, that nothing but what is essential to the credit of his justice and holiness shall ever induce him to destroy any thing he has made.
Matthew Henry Commentary
Verses 12-21 - God told Noah his purpose to destroy the wicked world by water. The secret of the Lord is with them that fear him, Ps 25:14. It is with all believers, enabling them to understand and apply the declarations an warnings of the written word. God chose to do it by a flood of waters which should drown the world. As he chooses the rod with which he corrects his children, so he chooses the sword with which he cuts of his enemies. God established his covenant with Noah. This is the firs place in the Bible where the word `covenant' is found; it seems to mean, 1. The covenant of providence; that the course of nature shall be continued to the end of time. 2. The covenant of grace; that God woul be a God to Noah, and that out of his seed God would take to himself people. God directed Noah to make an ark. This ark was like the hulk of a ship, fitted to float upon the waters. It was very large, half the size of St. Paul's cathedral, and would hold more than eighteen of the largest ships now used. God could have secured Noah without putting his to any care, or pains, or trouble; but employed him in making tha which was to be the means to preserve him, for the trial of his fait and obedience. Both the providence of God, and the grace of God, ow and crown the obedient and diligent. God gave Noah particular order how to make the ark, which could not therefore but be well fitted for the purpose. God promised Noah that he and his family should be kep alive in the ark. What we do in obedience to God, we and our familie are likely to have the benefit of. The piety of parents gets their children good in this life, and furthers them in the way to eterna life, if they improve it.
Original Hebrew
ומכל 3605 החי 2416 מכל 3605 בשׂר 1320 שׁנים 8147 מכל 3605 תביא 935 אל 413 התבה 8392 להחית 2421 אתך 854 זכר 2145 ונקבה 5347 יהיו׃ 1961