“Sealed by the Holy Spirit of Promise”
Doctrine and Covenants 132:7
7 And verily I say unto you, that the conditions of this law are these: All covenants, contracts, bonds, obligations, oaths, vows, performances, connections, associations, or expectations, that are not made and entered into and sealed by the Holy Spirit of promise, of him who is anointed, both as well for time and for all eternity, and that too most holy, by revelation and commandment through the medium of mine anointed, whom I have appointed on the earth to hold this power (and I have appointed unto my servant Joseph to hold this power in the last days, and there is never but one on the earth at a time on whom this power and the keys of this priesthood are conferred), are of no efficacy, virtue, or force in and after the resurrection from the dead; for all contracts that are not made unto this end have an end when men are dead.
Elder David A. Bednar said:
“The Holy Spirit of Promise is the ratifying power of the Holy Ghost. When sealed by the Holy Spirit of Promise, an ordinance, vow, or covenant is binding on earth and in heaven. (See D&C 132:7.) Receiving this ‘stamp of approval’ from the Holy Ghost is the result of faithfulness, integrity, and steadfastness in honoring gospel covenants ‘in [the] process of time’ (Moses 7:21). However, this sealing can be forfeited through unrighteousness and transgression.”
(“Ye Must Be Born Again,” Ensign or Liahona, May 2007, 22.)