Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
suyuti:2-223bʿBd Allāh b. Thʿlbh
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السيوطي:٢-٢٢٣b

"عَنْ عبد الله بن ثعلبة قال: رَأَيْتُ عُمَرَ سَجَدَ فِى الحَجِّ سَجْدتَيْنِ فِى الصُّبْحِ".  

مسدد، الطحاوى، [قط] الدارقطنى في السنن [ك] الحاكم في المستدرك

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Collected by Mālik
malik:15-15Mālik > ʿAbdullāh b. Dīnār

Yahya related to me from Malik that Abdullah ibn Dinar said, "I saw Abdullah ibn Umar prostrate twice in Surat al-Hajj (Sura 22)."  

مالك:١٥-١٥وَحَدَّثَنِي عَنْ مَالِكٍ عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ

أَنَّهُ قَالَ رَأَيْتُ عَبْدَ اللَّهِ بْنَ عُمَرَ يَسْجُدُ فِي سُورَةِ الْحَجِّ سَجْدَتَيْنِ