كتاب قصر الصلاة فى السفر
9  
Shortening the Prayer

Yahya related to me from Malik from Ibn Shihab that Abu Umama ibn Sahl ibn Hunayf said, "Zayd ibn Thabit entered the mosque and found the people in ruku, so he went into ruku and then moved slowly forward until he reached the row."

حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ أَبِي أُمَامَةَ بْنِ سَهْلِ بْنِ حُنَيْفٍ، أَنَّهُ قَالَ دَخَلَ زَيْدُ بْنُ ثَابِتٍ الْمَسْجِدَ فَوَجَدَ النَّاسَ رُكُوعًا فَرَكَعَ ثُمَّ دَبَّ حَتَّى وَصَلَ الصَّفَّ ‏.‏
USC-MSA web (English) reference : Book 9, Hadith 67
Arabic reference : Book 9, Hadith 398