Qāf 50:42

Yawma yasmaʿūna'ṣ-ṣayḥata bi'l-ḥaqq; dhālika yawmu'l-khurūj

"On that day they will hear the cry with the truth. That is the day of coming forth."

Its concrete sense: to shout aloud, to cry out. Ṣayḥa — a single cry (the faʿla pattern conveys a single occurrence); ṣiyāḥ — shouting; ṣāḥa'd-dīk — the cock crowed.

The Qurʾān uses this word in scenes of destruction: of Thamūd, Madyan and other peoples it is said "the cry seized them" (as at Hūd 11/67 and 94).

The usual use of the word in the Qurʾān, that is, is a word of destruction.

And here the same word is used for the call of the resurrection.

I record this as an observation: the same sound put an end to peoples in history; here it makes a beginning.

The last of the three bi'l-ḥaqqs set out in a table above:

What was denied in the fifth verse comes back with death in the nineteenth and with the cry in the forty-second.

And the expression is striking: the cry is heard "with the truth". Hearing, that is, is no longer something open to interpretation. No dispute remains as to what is heard.

And the most important internal link of the sūra is completed here.

In the eleventh verse, after the coming out of a plant from dead ground had been described, it was said:

kadhālika'l-khurūj — "such is the coming forth."

In the forty-second verse the same word comes, this time as the name of a day:

dhālika yawmu'l-khurūj — "that is the day of coming forth."

The same word, the same definiteness, the same pattern of demonstrative (kadhālika / dhālika).

And thirty-one verses lie between them.

The sūra gave a definition in the eleventh verse and in the forty-second placed that definition as the name of a day.

The structure of the proof is thus completed:

And this completes what the sūra has been building from the start: the addressee finds the name of the thing he called "far" in the name of what happens in his own field.

I present this as my own reading; the places of the two words in the text and their being from the same root are beyond dispute.

One more note: the word khurūj has been chosen instead of "resurrection" (baʿth) or "spreading out" (nashr). And khurūj is more concrete than either: to come out. The sūra names the most abstract event with the most concrete verb.