Muwatta Malik 759
موطأ مالك#759Sahihوَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم لَمْ يَعْتَمِرْ إِلاَّ ثَلاَثًا إِحْدَاهُنَّ فِي شَوَّالٍ وَاثْنَتَيْنِ فِي ذِي الْقَعْدَةِ .
Yahya related to me from Malik from Hisham ibn Urwa, from his father, that the Messenger of Allah, may Allah bless him and grant him peace, only did three umras, one of them in Shawwal, and two in Dhu'l-Qada
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Salim al-HilaliSahih
In-book reference: 20:55