17 And now behold, Ammon, and Aaron, and Omner, and Himni, and their brethren did rejoice exceedingly, for the success which they had had among the Lamanites, seeing that the Lord had granted unto them according to their prayers, and that he had also verified his word unto them in every particular.
Those promises aren’t always fulfilled immediately. Sometimes, we have to exercise our faith by “wait[ing] patiently for the Lord” (Psalm 40:1). But they will always be fulfilled in the Lord’s time. We can count on it. And they will be fulfilled precisely and completely.
When the Savior visited the Nephites and the Lamanites, He wanted them to know and remember that He had fulfilled all of His promises:
Verily I say unto you, I commanded my servant Samuel, the Lamanite, that he should testify unto this people, that at the day that the Father should glorify his name in me that there were many saints who should arise from the dead, and should appear unto many, and should minister unto them. And he said unto them: Was it not so? (3 Nephi 23:9)
When the disciples replied that the prophecies had been fulfilled, the Savior commanded them to write what had happened.
Why was He so concerned that they acknowledge the fulfillment of His promises? Perhaps it is because an awareness of His perfect integrity is foundational to our faith. When we know that He will keep His word, we are able to exercise more faith and to be patient longer. Our conviction can be bolstered by a remembrance of the many promises the Lord has kept to us and to others in the past. This must be one of the reasons that regular study of the scriptures is so important.