He, verily, will pay the doer of good, whether man or woman, his due recompense, wert thou to follow  what hath been sent unto thee by Him Who is the All-Knowing, the All-Informed. As to him who turneth aside, and swelleth with pride, after that the clear tokens have come unto him, from the Revealer of signs, his work shall God bring to naught. He, in truth, hath power over all things.

Bahá’u’lláh, Epistle to the Son of the Wolf, p. 60

Learn well this Tablet, O Ahmad. Chant it during thy days and withhold not thyself therefrom. For verily, God hath ordained for the one who chants it, the reward of a hundred martyrs and a service in both worlds. These favors have We bestowed upon thee as a bounty on Our part and a mercy from Our presence, that thou mayest be of those who are grateful.

Bahá’u’lláh, Tablet of Ahmad, Bahá’í Prayers, p. 211

The rewards of this life are the virtues and perfections which adorn the reality of man. For example, he was dark and becomes luminous, he was ignorant and becomes wise, he was neglectful and becomes vigilant, he was asleep and becomes awakened, he was dead and becomes living, he was blind and becomes a seer, he was deaf and becomes a hearer, he was earthly and becomes heavenly, he was material and becomes spiritual. Through these rewards he gains spiritual birth, and becomes a new creature.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 323

Therefore do the lovers of the Bahá Beauty wish for no other recompense but to reach that station where they may gaze upon Him in the Realm of Glory, and they walk no other path save over desert sands of longing for those exalted heights. They seek that ease and solace which will abide forever, and those bestowals that are sanctified beyond the understanding of the worldly mind.

‘Abdu’l-Bahá, Selections from the Writings of ‘Abdu’l-Bahá, p. 184

Verily, the Supreme Concourse utter praise upon you, because ye forsook the desires of self, were illumined by the light of guidance, clothed yourselves with the garment of sanctity and called in the Name of El-ABHA among the people. Verily, ye shall reap what ye sow and obtain the fruits of what ye plant. This is a pre-ordained fact.

‘Abdu’l-Bahá, Tablets of ‘Abdu’l-Bahá v1, p. 12

How bountiful, moreover, will be the rewards which He who watches from on high the varying fortunes of the Plan and presides over its destinies, must either in this world or in the next -- and it may well be in both -- choose to confer upon those, who, at the hour of the Plan's greatest need, will fly to its succour, exhibit the rarest evidences of courage and heroism, and choose to subordinate their personal interests to the immediate needs and future glory of the community to which they belong.

Shoghi Effendi, The Unfolding Destiny of the British Bahá’í Community, p. 233

The greater the pressure on those who shoulder both committee and Assembly responsibilities, the greater the reward and the richer the blessings vouchsafed to those who willingly and gratefully sustain this double burden.

Shoghi Effendi, Principles of Bahá’í Administration, p. 50

Minstrels wandering from tent to tent and from town to town sing tales of those intrepid souls who severed all their ties with the world, suffered with great tenacity, composure and dignity, and marched on and on, higher and higher, towards an apex which touches the zenith of the heavens of Glory.

Abu'l-Qasim Faizi, The Prince of Martyrs, p. 66

There needs no chastisement of fire; self-knowledge is man's punishment and his reward.

Dr. J.E. Esslemont, Bahá’u’lláh and the New Era, p. 208