The Book of Prayers
Ṣaḥīḥ Muslim 431b
Say this
سَلَّمَ أَحَدُكُمْ فَلْيَلْتَفِتْ إِلَى صَاحِبِهِ وَلاَ يُومِئْ بِيَدِهِ
sallama aḥadukum falyaltafit ilā ṣāḥibihi walā yūmiʾ biyadihi
Transliteration generated from the Arabic vowel marks
The full narration
Jabir b. Samura reported:We said our prayer with the Messenger of Allah (ﷺ) and, while pronouncing salutations, we made gestures with our hands (indicating)" Peace be upon you, peace be upon you." The Messenger of Allah (ﷺ) looked towards us and said: Why is it that you make gestures with your hands like the tails of headstrong horses? When any one of you pro- nounces salutation (in prayer) he should only turn his face towards his companion and should not make a gesture with his hand
Source
Ṣaḥīḥ Muslim · 431b
- Recorded in Ṣaḥīḥ Muslim, whose narrations are accepted as authentic
Also narrated in Sunan an-Nasā'ī 1326.