During his Sermon at the Temple, Jesus covenanted with his chosen twelve, "even so will he [your heavenly Father] clothe you, if ye are not of little faith" (3 Nephi 13:30). According to Raymond Treat, a man's robe was symbolic of all his material possessions. Therefore, by giving his robe, he was pledging everything he had to his covenant brother. . . . [Raymond C. Treat, "Understanding Our Covenant," in Recent Book of Mormon Developments, vol. 2, p. 35]
Note* According to Raymond Treat, Robes of Righteousness have to be given, they cannot be earned. [Alan C. Miner, Personal Notes]
“Even So Will He Clothe You if Ye Are Not of Little Faith”
During his Sermon at the Temple, Jesus specifically addressed the twelve as follows:
Take no thought for your life, what ye shall eat, or what ye shall drink; nor yet for your body, what ye shall put on. Is not the life more than meat, and the body than raiment? . . . Which of you by taking thought can add one cubit unto his stature? And why take thought for raiment? Consider the lilies of the field how they grow; they toil not, neither do they spin;
And yet I say unto you, that even Solomon, in all his glory, was not arrayed like one of these. Wherefore, if God so clothe the grass of the field, which today is, and tomorrow is cast into the oven, even so will he clothe you, if ye are not of little faith. (3 Nephi 13:25-30)
According to John Welch, in Greek the word endua, from which our word endow is directly derived, has two meanings. Enduo means "to clothe, to put on clothing." It also means "to take on characteristics, virtues, and intentions." When a person is endowed, the person is clothed. Jesus told his disciples not to leave Jerusalem (Luke 24:49) until they were "endued with power from on high." The clothing represents the robes of God's righteousness. The atonement occurs when one is encircled by the robes of God's righteousness, but his only occurs as these attributes are taken on--the attributes set forth in the beginning in the Beatitudes. Joseph Smith spoke frequently about the need to be endowed in the House of the Lord. It's interesting that Jesus expresses this idea by saying to his disciples, I will give you clothing. And the word there is endumata. I will give you garments that are more glorious than whose? Than the garments of Solomon ("even Solomon, in all his glory, was not arrayed like one of these"). He, of course, is always connected with the temple. [John W. Welch, "Christ at the Nephite Temple," in Teachings of the Book of Mormon, Semester 4, p. 143]