Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) narrates: When the Prophet (peace and blessings be upon him) intended to travel, he would recite:
'Allahumma bika asulu, wa bika ajulu, wa bika asir' (O Allah, with Your help I attack, with Your help I move about, and with Your help I travel.)
Ahmad and al-Bazzar recorded it, and the narrators of both are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأذكار / 17088
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه البزار فى المسند (3126) اخرجه احمد فى المسند (1295 و 691) ، أخرجه مسند أحمد برقم: 693»