Sunan an Nasai
3028
Sahih+2

It was narrated from Salim, from his father, that:the Messenger of Allah joined Maghrib and Isha; in Jam (Al-Muzdalifah), with one Iqamah, and he did not offer any voluntary prayers in between or after either of them

SahihAbu Ghuddah
SahihAl-Albani