the role of side sources in correction of bostan al-arefin and tohfat al-moridin

although old texts are distorted or changed due to various reasons such as unfamiliarity of writers who take them away from their origin and make it difficult to achieve a correct edition by using of the manuscripts, especially when there is a unique manuscript of the text or the existing manuscript is different with the other available versions, the correction of each text should be usually done on the basis of its manuscript or manuscripts. the corrector has no way except referring the sources or references had been used by the author. the corrector of bostan al-`arefin va tohfat al-moridin ,one of the mystical prose texts of the fifth century which its known manuscripts are different and the problems and ambiguities of the oldest of its manuscript are not solved just through comparing, had used such method in many cases and had corrected its inaccuracies. offering some examples of bostan al-`arefin va tohfat al-moridin and some of the other ancient texts we want to confirm the importance and the role of sources and references in the prcess of texts correction.