we have a full chapter of ahadeeth regarding this, and sheikh sudooq mentioned about 8 ahadeeth from holy prophet about ghaibat or occultation of imam ul qaim,

i present to you sahih chain from it,

the beauty of this chian is that it is in itself multichained, let us see how

4 – حدثنا أبي، ومحمدبن الحسن، ومحمدبن موسى المتوكل رضي الله عنهم قالوا: حدثنا سعدبن عبدالله، وعبدالله بن جعفر الحميري، ومحمدبن يحيى العطار جميعا قالوا: حدثنا أحمدبن محمدبن عيسى، وإبراهيم بن هاشم، وأحمدبن أبي عبدالله البرقي، ومحمدبن الحسين بن أبي الخطاب جميعا: قالوا: حدثنا أبوعلي الحسن ابن محبوب السراد، عن داود بن الحصين، عن أبي بصير، عن الصادق جعفربن محمد

عن آبائه عليهم السلام قال: قال رسول الله صلى الله عليه وآله: المهدي من ولدي، اسمه اسمي، وكنيته كنيتي، أشبه الناس بي خلقا وخلقا، تكون له غيبة وحيرة حتى تضل الخلق عن أديانهم، فعند ذلك يقبل كالشهاب الثاقب فيملاها قسطا وعدلا كماملئت ظلما وجورا.

narrated to me my father, mohammad bin hasan, and muhamma bin musa mutawakil  :

they said, told us saad bin abdullah and abdullah bin jafar and mohammad bin yahya attar:

they said: told us ahmad bin mohammad bin esa and ibrahim bin hashim and ahmad bin abu abdullah barqi  and mohammad bin hassan bin abu khatab:

they said told us abu ali hasan bin mohboob sarad

from daood bin haseen

from abu baseer

from imam jafar sadiq

who from his ancestors said that holy prophet said: mehdi is from my progeny, his name is my name, his kuniyyat is my kuniyyat (that is relation of father or son name), he will be like me in creation and nature, for him is ghabiat/occultation and surprise, till creation will be misguided in religion, then he will appear like a shooting star, and fill the earth with justice like it was filled with cruelty

[kamal ud deen, chapter 25, hadeeth 4]

now, the beauty of this chain is that it gives u so many great names in each step, till it reaches hasan bin mahboob

and keep in mind that it is agreed in shia sect that if he is narrating, it means it is sahih

till the tareeq to him is sahih

so a great great chain