Translation of the verse 3 from Surah Al-hujurat : Number of verses 18 - - page 515 - Part 26.
Verily! Those who lower their voices in the presence of Allah's Messenger (SAW), they are the ones whose hearts Allah has tested for piety. For them is forgiveness and a great reward.
Indeed, those who lower their voices before the Messenger of Allah - they are the ones whose hearts Allah has tested for righteousness. For them is forgiveness and great reward.
(49:3) The ones who lower their voices in the presence of the Messenger of Allah are those whose hearts Allah has tested for God-fearing. *5 Theirs shall be forgiveness and a great reward.
*5) That is, "Only those people give due reverence to the Messenger of Allah, who have passed successfully through the tests and trials set by Allah and proved by their steadfastness that their hearts indeed possess tagva (piety). " From this it follows automatically that the heart which is devoid of reverence for the Holy Prophet is, in fact, devoid of tagva, and a person's raising his voice louder than the Holy Prophet's is not only an uncivilized act outwardly but also a sign of the absence of tagva in his heart.