9:41
ٱنفِرُوا۟ خِفَافًۭا وَثِقَالًۭا وَجَٰهِدُوا۟ بِأَمْوَٰلِكُمْ وَأَنفُسِكُمْ فِى سَبِيلِ ٱللَّهِ ۚ ذَٰلِكُمْ خَيْرٌۭ لَّكُمْ إِن كُنتُمْ تَعْلَمُونَ
Go forth, whether light or heavy, and strive with your wealth and your lives in the cause of Allah. That is better for you, if you only knew.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
Jihad is required in all Conditions
Sufyan Ath-Thawri narrated from his father from Abu Ad-Duha, Muslim bin Subayh, who said, "This Ayah,
انْفِرُواْ خِفَافًا وَثِقَالاً
(March forth, whether you are light or heavy) was the first part to be revealed from Surah Bara'ah." Mu`tamir bin Sulayman narrated that his father said, "Hadrami claimed that he was told that some people used to declare that they will not gain sin (if they lag behind the forces of Jihad) because they are ill or old. This Ayah was revealed,
انْفِرُواْ خِفَافًا وَثِقَالاً
(March forth, whether you are light or heavy.)" Allah commanded mass mobilization together with the Messenger of Allah ﷺ for the battle of Tabuk, to fight the disbelieving, People of the Book, the Romans, Allah's enemies. Allah ordained that the believers all march forth with the Messenger ﷺ regardless whether they felt active, lazy, at ease or had difficult circumstances,