The Sufficient (Vol 3) · Hadith 1764 (#Ḥadīth #29)
Chapter 84 | The Optional Salah (prayer)
29ـ أَحْمَدُ بْنُ إِدْرِيسَ عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ ابْنِ مَحْبُوبٍ عَنْ أَبِي وَلاَّدٍ حَفْصِ بْنِ سَالِمٍ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلام) عَنِ التَّسْلِيمِ فِي رَكْعَتَيِ الْوَتْرِ فَقَالَ نَعَمْ وَإِنْ كَانَتْ لَكَ حَاجَةٌ فَاخْرُجْ وَاقْضِهَا ثُمَّ عُدْ وَارْكَعْ رَكْعَةً.
29. Ahmad ibn Idris has narrated from Ahmad ibn Muhammad from ibn Mahbub from abu Wallad Hafs ibn Salim who has said the following: “I once asked abu ‘Abd Allah , about Salam (the phrase of offering greeting of peace) in the two Rak’at of al-Witr. He (the Imam) said, ‘Yes, if you may need something, you can go out and when you are prepared, then come back to perform one Rak’at.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).