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.’

al-Kafi, v. 2, p. 493, no. 13

Source: en.shafaqna.com