Sunan Ibn Majah, Book 31, Hadith 3615 (In-Book) ⓘ
It was narrated from Anas bin Malik that the Messenger of Allah said: “Whoever wants to be cupped, let him seek out the seventeenth, nineteenth or twenty-first (of the month); and let none of you allow his blood to rage so that it kills him.”
حَدَّثَنَا سُوَيْدُ بْنُ سَعِيدٍ، حَدَّثَنَا عُثْمَانُ بْنُ مَطَرٍ، عَنْ زَكَرِيَّا بْنِ مَيْسَرَةَ، عَنِ النَّهَّاسِ بْنِ قَهْمٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ قَالَ " مَنْ أَرَادَ الْحِجَامَةَ فَلْيَتَحَرَّ سَبْعَةَ عَشَرَ أَوْ تِسْعَةَ عَشَرَ أَوْ إِحْدَى وَعِشْرِينَ وَلاَ يَتَبَيَّغْ بِأَحَدِكُمُ الدَّمُ فَيَقْتُلَهُ " .
also referenced under: Hadith 3486 (Reference) & Volume 4, Book 31, Hadith 3486 (DarusSalam)