Bukhari

Hadith Commentary:
In the narration of Tabari, it is mentioned that the verse was revealed regarding the supplication made in the Tashahhud. It is possible that this verse was revealed twice:
Once regarding recitation,
And a second time regarding supplication. In this way, both narrations can be reconciled.
In the verse, those performing prayer are instructed towards moderation,
Which pertains to the audible (jahri) prayers.
The context of revelation (shaan al-nuzul) has already been mentioned in the previous hadith.
The esteemed person mentioned in the chain of transmission is Hisham, the son of Urwah ibn Zubayr, whose kunyah is Abu Mundhir, a Qurashi and Madinan, well-known among the Tabi‘in, among the eminent scholars and distinguished Tabi‘in.
He was born in 61 AH.
He came to Baghdad during the time of Caliph Mansur.
He passed away in Baghdad itself in 146 AH.
Rahimahullah rahmatan wasi‘ah.

Hadith Commentary:
1.
On the surface, there appears to be a contradiction between these two hadiths because in the first hadith it is stated that this verse was revealed regarding recitation in prayer, whereas in the second hadith it is mentioned that this verse was revealed concerning supplication (du'a).
The reconciliation between them is given as follows:
➊
Each narrator has described the context of revelation (shaan-e-nuzool) according to his own knowledge; therefore, there is no contradiction between them.
➋
It is possible that this verse was revealed twice:
Once regarding prayer (salah) and a second time regarding supplication (du'a).
➌
This verse is fundamentally about prayer (salah), and in the narration where its context of revelation is mentioned as supplication (du'a), the part is mentioned but the whole is intended, because supplication is a part of prayer.
One night, the Messenger of Allah (sallallahu alayhi wa sallam) passed by Abu Bakr (radi Allahu anhu) and saw that he was performing prayer in a low voice. Then he happened to see Umar (radi Allahu anhu) as well, and he was reciting the Qur'an in a loud voice.
The Messenger of Allah (sallallahu alayhi wa sallam) asked both of them, so Abu Bakr (radi Allahu anhu) replied:
"The One with Whom I was engaged in intimate conversation was hearing my voice."
Umar (radi Allahu anhu) replied:
"My intention was to awaken those who were sleeping and to drive away Satan."
The Prophet (sallallahu alayhi wa sallam) said to Abu Bakr (radi Allahu anhu):
"Raise your voice a little."
And he said to Umar (radi Allahu anhu):
"Lower your voice a little."
(Sunan Abi Dawud, al-Tatawwu', Hadith: 1329)
Hafiz Ibn Hajar rahimahullah states that this verse was revealed regarding the supplication (du'a) that is made during prayer, so that reconciliation is achieved between both hadiths.
(Fath al-Bari: 8/515)