Muwatta Malik 992
Jihad
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، كَانَ يَقُولُ اللَّهُمَّ إِنِّي أَسْأَلُكَ شَهَادَةً فِي سَبِيلِكَ وَوَفَاةً بِبَلَدِ رَسُولِكَ .
Yahya related to me from Malik from Zayd ibn Aslam that Umar ibn al-Khattab used to say, "O Allah! I ask you for martyrdom in Your way and death in the city of Your Messenger
Grading: Salim al-Hilali: Mauquf Sahih
Text from the public-domain hadith-api dataset. Numbering follows that dataset and can differ by a few from some printed editions — check the wording, not only the number.