Detailing the summary in the story:

And among these reports narrated in the books of exegesis

is what contains details of the summary of the story

whose origin was alluded to in the Quranic text,

so the exegetes address its details from Israelite narrations,

or books of biography and history,

and they discuss all its parts and details.

Two categories of this detailing:

And here is another topic, which is that if the verse includes a clear allusion to the story or incident such that one well-versed in the language pauses at that place and resorts to researching it and knowing about it,

then the exegete must clarify it, and it is among his responsibilities.

But what does not enter into this category - for example - is mentioning "the cow of the Children of Israel"

so discussing whether it was male or female,

or explaining whether the dog of the People of the Cave was spotted or red,

all of that is from the burdensome pursuit of what does not concern one,

and indeed the Companions - may Allah be pleased with them - disliked that and considered it wasting time and engaging in what does not concern the Muslim.

Two principles must be observed:

And here it is appropriate that two principles be kept in mind and attention be paid to observing them:

1 - The first, is that the established principle regarded in this chapter is that there be cited