6. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ali ibn al-Nu‘man from ibn Muskan from Sulayman ibn Khalid who has said the following:

“Abu ‘Abd Allah , has said, ‘If a man finds the Imam in Ruku‘ (bowing down on one’s knees), says Takbir (Allah is great beyond description) while his back is straight and performs Ruku‘ before the Imam raises his head, has joined for one Rak‘at.’”