The Companions of Allāh’s Messenger – peace and blessings be upon him – used to say to each other when they met on ‘Eid:
(taqabbalallāhu minnā wa minkum, which means ‘may Allāh accept from us and you [our fasts and deeds].’)
Al-Ḥāfidh Ibn Ḥajr, Fatḥ Al-Bārī, grades this narration’s chain of transmission ḥasan and cites it from Al-Maḥāmilīyyāt.
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Religion and Aqidah is taken from the Companions. Where did the other sects get it from?
Abū Isḥāq [Al-Fazārī] states: The enemy was never able to stand up to the Companions of Allāh’s Messenger – Allāh’s praise and peace be upon him, so when the news of the defeat of the Romans came to Heraclius at Antioch he asked [his people], “Woe to you, tell me about these people who fight […]
It is reported that ʿAbdullāh b. ʿUmar – Allāh be pleased with him – was asked: Did the Companions of Allāh’s Messenger – Allāh’s peace and blessings be upon him – used to laugh? He replied, “Yes, and the īmān (faith) in their hearts was greater than the mountains.” ʿAbd Al-Razzāq Al-Ṣan’ānī, Al-Muṣannaf 11:327.