Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) regarding this verse: "So whoever among you witnesses the month, let him fast it," says: Whoever finds Ramadan while at home, then intends to travel, he should fast.
Hadith Referenceسنن سعید بن منصور / كتاب التفسير / 273
Hadith Gradingمحدثین:سنده ضعيف جدًا، فليث بن أبي سليم تقدم في الحديث [٩]
Abu Mujalid (may Allah have mercy on him) says: When the month of Ramadan arrives, then no one should undertake a journey, and if it is absolutely necessary to travel, then he should fast during the journey.
Hadith Referenceسنن سعید بن منصور / كتاب التفسير / 274
Hadith Gradingمحدثین:سنده صحيح.
Hadith Takhrij«أخرجه سعيد بن منصور فى (سننه) برقم: 274، وابن أبى شيبة فى (مصنفه) برقم: 9093»