Musnad Ahmad 26:174

'Affan narrated to us, Shu'bah narrated to us, Abu Ishaq informed us, from Abu 'Ubaydah and Abu al-Ahwas, who said—and this is the hadith of Abu 'Ubaydah—from his father, who said: "The Messenger of Allah (ﷺ) taught us two sermons: the sermon of need (khutbat al-hajah) and the sermon of prayer: 'All praise is due to Allah,' or 'Indeed, all praise is due to Allah; we seek His help.'" He then mentioned its meaning.