The scriptures are replete with instances of Nephi praying.
16 And it came to pass that I, Nephi, being exceedingly young, nevertheless being large in stature, and also having great desires to know of the mysteries of God, wherefore, I did cry unto the Lord; and behold he did visit me, and did soften my heart that I did believe all the words which had been spoken by my father; wherefore, I did not rebel against him like unto my brothers.
17 But it came to pass that I prayed unto the Lord, saying: O Lord, according to my faith which is in thee, wilt thou deliver me from the hands of my brethren; yea, even give me strength that I may burst these bands with which I am bound.
18 And it came to pass that when I had said these words, behold, the bands were loosed from off my hands and feet, and I stood before my brethren, and I spake unto them again.
19 For he that diligently seeketh shall find; and the mysteries of God shall be unfolded unto them, by the power of the Holy Ghost, as well in these times as in times of old, and as well in times of old as in times to come; wherefore, the course of the Lord is one eternal round.
1 For it came to pass after I had desired to know the things that my father had seen, and believing that the Lord was able to make them known unto me, as I sat pondering in mine heart I was caught away in the Spirit of the Lord, yea, into an exceedingly high mountain, which I never had before seen, and upon which I never had before set my foot.
8 And I said unto them: Have ye inquired of the Lord?
9 And they said unto me: We have not; for the Lord maketh no such thing known unto us.
10 Behold, I said unto them: How is it that ye do not keep the commandments of the Lord? How is it that ye will perish, because of the hardness of your hearts?
11 Do ye not remember the things which the Lord hath said?—If ye will not harden your hearts, and ask me in faith, believing that ye shall receive, with diligence in keeping my commandments, surely these things shall be made known unto you.
9 And it came to pass that the voice of the Lord spake unto my father by night, and commanded him that on the morrow he should take his journey into the wilderness.
10 And it came to pass that as my father arose in the morning, and went forth to the tent door, to his great astonishment he beheld upon the ground a round ball of curious workmanship; and it was of fine brass. And within the ball were two spindles; and the one pointed the way whither we should go into the wilderness.
23 And it came to pass that I, Nephi, did make out of wood a bow, and out of a straight stick, an arrow; wherefore, I did arm myself with a bow and an arrow, with a sling and with stones. And I said unto my father: Whither shall I go to obtain food?
24 And it came to pass that he did inquire of the Lord…
26 And it came to pass that the voice of the Lord said unto him: Look upon the ball, and behold the things which are written.
30 And it came to pass that I, Nephi, did go forth up into the top of the mountain, according to the directions which were given upon the ball.
31 And it came to pass that I did slay wild beasts, insomuch that I did obtain food for our families.
7 And it came to pass that after I, Nephi, had been in the land of Bountiful for the space of many days, the voice of the Lord came unto me, saying: Arise, and get thee into the mountain. And it came to pass that I arose and went up into the mountain, and cried unto the Lord.
8 And it came to pass that the Lord spake unto me, saying: Thou shalt construct a ship, after the manner which I shall show thee, that I may carry thy people across these waters.
9 And I said: Lord, whither shall I go that I may find ore to molten, that I may make tools to construct the ship after the manner which thou hast shown unto me?
10 And it came to pass that the Lord told me whither I should go to find ore, that I might make tools.
16 Nevertheless, I did look unto my God, and I did praise him all the day long; and I did not murmur against the Lord because of mine afflictions.
21 And it came to pass after they had loosed me, behold, I took the compass, and it did work whither I desired it. And it came to pass that I prayed unto the Lord; and after I had prayed the winds did cease, and the storm did cease, and there was a great calm.
22 And it came to pass that I, Nephi, did guide the ship, that we sailed again towards the promised land.
3 And I, Nephi, did go into the mount oft, and I did pray oft unto the Lord; wherefore the Lord showed unto me great things.
3 Call unto me, and I will answer thee, and shew thee great and mighty things, which thou knowest not.
16 Confess your faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much.