Sahih Muslim , Book 4, Hadith 796 (USC-MSA) ⓘ
Abdullah b. Mas'ud reported: We were sitting with the Apostle in prayer, and the rest of the hadith is the same as narrated by Mansur He (also said): After (reciting tashahud) he may choose any prayer.
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا أَبُو مُعَاوِيَةَ، عَنِ الأَعْمَشِ، عَنْ شَقِيقٍ، عَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ، قَالَ كُنَّا إِذَا جَلَسْنَا مَعَ النَّبِيِّ صلى الله عليه وسلم فِي الصَّلاَةِ . بِمِثْلِ حَدِيثِ مَنْصُورٍ وَقَالَ " ثُمَّ يَتَخَيَّرُ بَعْدُ مِنَ الدُّعَاءِ " .
also referenced under: Book 4, Hadith 62 (In-Book) & Hadith 402 (Reference)