Sunan Abi Da'ud · Hadith 1490
Detailed Injunctions about Witr - كتاب الوتر
حدثنا عمرو بن عثمان، حدثنا سفيان، حدثني عباس بن عبد الله بن معبد بن عباس، بهذا الحديث قال فيه والابتهال هكذا ورفع يديه وجعل ظهورهما مما يلي وجهه .
In another version Ibn 'Abbas said: Earnest supplication should be made like this: he raised his hand and made his palms in the direction of his face.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).