Jami` at-Tirmidhi 239
جامع الترمذي#239Da'ifAbu Hurairah narrated:"When Allah's Messenger performed the Takbir for Salat he would spread his fingers
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirDaif
Al-AlbaniDaif
Zubair Ali ZaiDaif
In-book reference: 2:91