Not graded
Bulugh al-Maram 335b
وَفِي رِوَايَةٍ لِلْبُخَارِيِّ : { فَلْيُتِمَّ , ثُمَّ يُسَلِّمْ , ثُمَّ يَسْجُدْ } . 1
1 - صحيح . رواه البخاري ( 1 /504 / فتح ) .
And in the narration of al-Bukhari:
'he should complete (the prayer) then he should say Taslim and then perform the prostration'.
Cited in Bulugh al-Maram (No. 335b).