Musannaf Ibn Abi Shayba 28:890

'Abdah ibn Sulayman narrated to us, from al-Afriqi, from 'Abdullah ibn Yazid, from 'Abdullah ibn 'Amr, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Do not wish to meet the enemy, and ask Allah for well-being. But if you meet them, then stand firm and remember Allah. And if they clamor or shout, then upon you is silence."