Qays ibn Ya'qub
Qays ibn Ya'qub kept company with al-Ṣādiq (ʿa) and was of Kufa.
مهمل · Muhmal — mentioned, no judgement passed
When he lived
The Prophet, then the twelve Imams in order in gold: al-Ṣādiq (ʿa)
In this collection
Counted from the narrations and chains this database holds — not a record of everything he transmitted.
Vol. 15 Entry no. 9705
Edition: 5th edition, 1413 AH / 1992 CE; editor and publisher not stated in the source
قيس بن يعقوب: قيس ويونس ويوسف، بنو يعقوب بن قيس البجلي الدهني الكوفي، مولى أبو عمارة، من أصحاب الصادق عليه السلام، رجال الشيخ (22).
Assembled from 1 entries and 1 mentions in the chains. Every word above is quoted from the book named beside it, and none of it is our judgement of him.