Ephesians 6:13-18:
13 Wherefore take unto you the whole armour of God, that ye may be able to withstand in the evil day, and having done all, to stand.
14 Stand therefore, having your loins girt about with truth, and having on the breastplate of righteousness;
15 And your feet shod with the preparation of the gospel of peace;
16 Above all, taking the shield of faith, wherewith ye shall be able to quench all the fiery darts of the wicked.
17 And take the helmet of salvation, and the sword of the Spirit, which is the word of God:
18 Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints;
and Alma 46:13:
And he fastened on his head-plate, and his breastplate,
and his shields, and girded on his armor about his loins; and he took
the pole, which had on the end thereof his rent coat, (and he called it
the title of liberty) and he bowed
himself to the earth, and he prayed mightily unto his God for the
blessings of liberty to rest upon his brethren, so long as there should a
band of Christians remain to possess the land.
Both scriptures mention putting on armor, and both then talk about praying with fervor.