Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both) narrates: "I came while the Messenger of Allah (peace and blessings be upon him) was sitting among some of his Companions, among whom was Sayyiduna Umar bin al-Khattab (may Allah be pleased with him). I caught the last part of the talk, as the Messenger of Allah (peace and blessings be upon him) was saying: 'Whoever prays four rak'ahs before Asr, the Fire will not touch him.' So I gestured with my hand like this (the narrator showed by moving his hand) and said: 'This is an excellent hadith.' At this Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) said to me: 'The part of the beginning of the hadith that you missed is far more excellent than this.' I said: 'O Ibn al-Khattab! Then tell it.' Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) said: 'The Messenger of Allah (peace and blessings be upon him) narrated to us: "Whoever testifies that there is no god but Allah enters Paradise."'"
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) via Sayyiduna Umar (may Allah be pleased with him) only with this chain; Hajjaj is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الألف / 2580
Hadith Gradingمحدثین:إسناده ضعيف، فيه حجاج بن نصر وعبد الكريم أبو أمية
Hadith Takhrij«قال الهيثمي: فيه حجاج بن نصر والأكثرون على تضعيفه «مجمع الزوائد ومنبع الفوائد، ج 1، ص 22»» «قال الهيثمي: فيه عبد الكريم أبو أمية وهو ضعيف «مجمع الزوائد ومنبع الفوائد، ج 2، ص 222»» «قال بدر الدين العيني: فيه عبد الكريم بن أبي المخارق ضعيف «عمدة القاري شرح صحيح البخاري، ج 7، ص 234»»