´It was narrated that Abu Ma’mar said:` “I said to Khabbab: ‘How did you recognize that the Messenger of Allah (ﷺ) was reciting in the Zuhr and the ‘Asr?’ He said: ‘From the movement of his beard.’”
Hadith Referenceسنن ابن ماجه / كتاب إقامة الصلاة والسنة / 826
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح بخاري
´It was narrated that Abu Mas’ud said:` “The Messenger of Allah (ﷺ) said: ‘No prayer is acceptable in which a man does not settle his spine when bowing and when prostrating.’”
Hadith Referenceسنن ابن ماجه / كتاب إقامة الصلاة والسنة / 870
´It was narrated that Abu Mas’ud Al-Ansari said:` “The Messenger of Allah (ﷺ) used to gently pat our shoulders (to make sure the row was straight) at the time of prayer, saying: ‘Keep (the rows) straight, do not differ from one another lest your hearts should suffer from discord. Let those who are forbearing and wise stand closest to me, then those who are next to them, then those who are next to them.’”
Hadith Referenceسنن ابن ماجه / كتاب إقامة الصلاة والسنة / 976
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم