«كَمَالِكٍ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ»
For example, Malik transmitting from Nafiʿ, from ʿAbd Allah ibn ʿUmar.
This is a celebrated high-quality transmission chain, mentioned by hadith authorities among exceptionally strong isnads. If a sound instance with this kind of preservation occurs outside the two Sahih collections, its exclusion from those compilations does not erase its evidentiary weight.
Qualification: simply seeing famous narrator names never removes the need to examine the particular report's accuracy, continuity, anomalies, hidden defects, and parallel routes. The point is to illustrate chain-specific indicators of strength.