Mahasamgata Sutra - Dharma-ending age

http://www.buddhistdoor.com/oldweb/bdoor/archive/nutshell/teach86.htm
According to Mahasamgata Sutra, it reveals that in the Dharma-ending age, there will be countless practitioners of lower capacity or potential, so very few will succeed in attaining liberation. However, Pure Land sect provides the most simple, reliable and effective way in the attainment of liberation.
http://www.buddhistdoor.com/oldweb/bdoor/archive/nutshell/teach86.htm

Also according to Maharatnakuta Sutra, Shakyamuni Buddha urged his father, the King Suddhodana and sixty thousand members of his Sakya clan to seek rebirth in Pure Land.
Dharma Master Kumarajiva (343-413)
http://www.buddhistdoor.com/OldWeb/passissue/9609/sources/diamond4.htm

释尊如何报答亲恩
http://www.dizang.org/xj/wjsz.htm
释尊成佛以后，先度他的父亲净饭王，恐其父王对佛法不信仰，特派优婆离尊者到王宫，腾身虚空，显现种种神通；天龙八部示现种种庄严供养，以折服人间因王富贵之俗念，使其安心皈依三宝。释尊又以般若圣智，阐明世间苦、空、无常的至理。最后劝导父王和一切释姓王族，均修行净土法门，深信切愿，一心称念'阿弥陀佛'，求生极乐世界。此次法会，父王以下立时得法眼净，证果位者甚多。