Alqama narrates that Abdullah bin Masood said,
Should I not show you the salaah of Rasulullah (Salaa Allahu alayhi wa sallam). Then he performed and he did not raise his hands except the first time (at Takbeer Oola). This Hadith is absolutely clear and Sahih. (Tirmidhi vol. 1 pg. 58)
In this Hadith the reliability of Asim bin Kulaib is brought to question. Asim bin Kulaib is a narrator of Muslim and he is reliable. This Hadith has also been narrated from another chain of narrators, thus consolidating the hadith.