Is the Hadith: "Three, each the son of a caliph, will fight over your treasure... If you see him, then pledge allegiance to him, even if you have to crawl over snow, for he is the Caliph of God, the Mahdi," authentic or weak, and what are the most sound opinions regarding it?

"This Hadith has been a subject of disagreement among Hadith scholars, some deeming it authentic (sahih) and others weak (da'if). It is difficult to definitively assert the most correct opinion due to the multitude of proponents and arguments, and a judgment can only be made by a specialized scholar. The IslamQA website has mentioned a part of this disagreement and its underlying reasons. Authenticating the Hadith means following one of the two opinions concerning it."