SHAFAQNA-
Raise your voices in invocation of blessings on the holy prophet
The merciful prophet of Islam says:
ارفَعوا أصواتَكُم بالصَّلاةِ علَيَّ؛ فإنّها تَذهَبُ بالنِّفاقِ .
‘Raise your voices in invocation of blessings on me for it takes away hypocrisy.’
Source: al-Kafi, v. 2, p. 493, no. 13