Which Scriptures say that by chanting Lord's name during the time of one's death one can attain “Moksha”?

This Brahma Vaivarta Purana chapter states that, one, who chants the name "Shiva", during his/her dying moments, is sure to attain moksha.

Shri Krishna then revealed the excellent value of �Shiva Linga Sthapana�or establishing a Shiva Linga; he said: Maha Deva Maha Deva Maha Deveti vaadinah, Paschaadyaami Mahaastrasto naama shravana lobhatah, Shiveti mantramucchharya praanamstyajati yo narah/ Koti janmaarjitaat Paapaanmukto muktim prayaati sah, Shivam kalyaana vachanam kalyaanam kalyaanam Muktivaachikam/ Yaatsattha Prabhavettena sa Shivah parikeertitah/ (If some body recites Maha Deva, Maha Deva and Maha Deva, I am tempted to be behind him and follow him; if somebody takes Shiva�s name at the time of his death, that person would be freed from the sins committed by his/her previous crores of lives and most certainly secure �Moksha�. The word �Shiva� stands for �Kalyana� or Propitiousness and the word Kalyana denotes �Mukti�. Also the letter �Shi� stood for �Paapa naashan and Va for Moksha

The story of Ajamila in Bhagawata Purana is an example of the power of chanting the Lord's Name in the last moments of life, even if accidentally. Although the reference is not directly to Moksha, the Vishnudutas avert the immediate mortality of Ajamila, because he chanted the Lord's Name in the last moment.

Of course, the inner significance is that, to be able to chant the Lord's Name at the time of death, one needs to train the mind throughout the life. Sri Ramakrishna mentions a story to illustrate this point about training the mind to chant the Lord's name. A businessman named all his four sons after the names of Lord Narayana, in the hope that, like Ajamila, he will call out one of those names in his last moments, and thereby attain liberation. In the last moment, he called out the names of all the four sons. While they reached his bedside, he exclaimed, 'You fellows! If all of you come here to my bedside, who will take care of the business ?' . And he breathed his last!. He finally thought of his money, instead of chanting the Lord's Name.