Mosiah 18:8-10

8 And it came to pass that he said unto them: Behold, here are the waters of Mormon (for thus were they called) and now, as ye are desirous to come into the fold of God, and to be called his people, and are willing to bear one another's burdens, that they may be light;
9 Yea, and are willing to mourn with those that mourn; yea, and comfort those that stand in need of comfort, and to stand as a witness of God at all times and in all things, and in all places that ye may be in, even until death, that ye may be redeemed of God, and be numbered with those of the first resurrection, that ye may have eternal life--
10 Now I say unto you, if this be the desire of your hearts, what have ye against being baptized in the name of the Lord, as a witness before him that ye have entered into a covenant with him, that ye will serve him and keep his commandments, that he may pour out his spirit more abundantly upon you?

Mosiah 5:2, 7, 13

2 And they all cried with one voice, saying: Yea, we believe all the words which thou hast spoken unto us; and also, we know of their surety and truth, because of the Spirit of the Lord Omnipotent, which has wrought a mighty change in us, or in our hearts, that we have no more disposition to do evil, but to do good continually.

7 And now, because of the covenant which ye have made ye shall be called the children of Christ, his sons, and his daughters; for behold, this day he hath spiritually begotten you; for ye say your hearts are changed through faith on his name; therefore, ye are born of him and have become his sons and his daughters.

13 For how knoweth a man the master whom he has not served, and who is a stranger unto him, and is far from the thoughts and intents of his heart.

2 Nephi 30:2

2 For behold, I say unto you that as many of the Gentiles as will repent are the covenant people of the Lord; and as many of the Jews as will not repent shall be cast off; for the Lord covenanteth with none save it be with them that repent and believe in his Son, who is the Holy One of Israel.

2 Nephi 3:21

21. Because of their faith their words shall proceed forth out of my mouth unto their brethren who are the fruit of thy loins; and the weakness of their words will I make strong in their faith, unto the remembering of my covenant which I made unto thy fathers.

1 Nephi 14:13-14

13. And it came to pass that I beheld that the great mother of abominations did gather together multitudes upon the face of all the earth, among all the nations of the Gentiles, to fight against the Lamb of God.
14. And it came to pass that I, Nephi, beheld the power of the Lamb of God, that it descended upon the saints of the church of the Lamb, and upon the covenant people of the Lord, who were scattered upon all the face of the earth, and they were armed with righteousness and with the power of God in great glory.

Proverbs 16:3

3. Commit thy works unto the Lord, and thy thoughts shall be established.

D&C 20:37

37. And again, by way of commandment to the church concerning the manner of baptism--All those who humble themselves before God, and desire to be baptized, and come forth with broken hearts and contrite spirits, and witness before the church that they have truly repented of all their sins, and are willing to take upon them the name of Jesus Christ, having a determination to serve him to the end, and truly manifest by their works that they have received of the Spirit of Christ unto the remission of their sins, shall be received by baptism into his church.

Dallin H. Oaks (October 2000 Conference)

The Final Judgment is not just an evaluation of a sum total of good and evil acts-what we have done. It is an acknowledgment of the final effect of our acts and thoughts-what we have become. It is not enough for anyone just to go through the motions. The commandments, ordinances, and covenants of the gospel are not a list of deposits required to be made in some heavenly account. The gospel of Jesus Christ is a plan that shows us how to become what our Heavenly Father desires us to become.

Mosiah 5:7

7. And now, because of the covenant which ye have made ye shall be called the children of Christ, his sons, and his daughters; for behold, this day he hath spiritually begotten you; for ye say that your hearts are changed through faith on his name, therefore, ye are born of him, and have become his sons and his daughters.

D&C 35:24

Keep all the commandments and covenants by which ye are bound, and I will cause the heavens to shake for your good, and Satan shall tremble and Zion shall rejoice upon the hills and flourish.