Qays bin Abbad (may Allah have mercy on him) relates that the Companions (may Allah be pleased with them) disliked raising the voice on three occasions: (1) at the time of fighting, (2) at funerals, (3) at the time of dhikr (remembrance of Allah).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18466
It is narrated from Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Do not wish to meet the enemy; rather, ask Allah for well-being. If you do meet the enemy, then stand firm and remember Allah abundantly. If they raise a clamour and shout, then hold fast to silence."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18469