just before dying

"O World Honored One, such a man or woman in Jambudvipa, approaching the end of his life, might be in a coma or an unconscious stupor and, thus, not be able to differentiate the virtuous from the evil; or he might even have lost entirely his faculties of hearing and seeing. So his or her relatives ought to provide major offerings and read and recite the revered sutras and invoke the names of Buddhas and Bodhisattvas. Such virtuous acts could divert the dead one away from evil paths, and all the maras, demons and gods would then withdraw and be dispersed.

O World Honored One, if sentient beings could, at the end of their lives, hear the name of even one Buddha or of one Bodhisattva, or hear even one sentence of one gatha of the Mahayana Sutras, I see that such people, with the exception of those who have committed the five unpardonable sins, will all be exonerated from their minor evil karma, which otherwise would deserve rebirth on evil paths of existence."

The Buddha told Demon King Master-of-Lives, "Because of your great mercy, you are able to take such a vow of great mercy to protect sentient beings at their births and at their deaths. In the future, at the time of the births and the deaths of men and women, do not shy away from your vow, but always liberate them so they will forever be happy."

The Demon King addressed the Buddha, saying, "Please have no worry. I shall, until the end of my present form, support and protect all sentient beings in Jambudvipa moment by moment, so that at the time of their births and their deaths they will be happy. I only hope that these sentient beings trust and accept my words at the time of their births and deaths, so that none of them will not be liberated and so that all of them may gain enormous benefit thereby."

The Sutra of Bodhisattva Ksitigarbha's Fundamental Vows
http://www.sinc.sunysb.edu/clubs/buddhism/ksitigarbha/chap8.html
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