﴿ ٱنفِرُوا۟ خِفَافًۭا وَثِقَالًۭا وَجَٰهِدُوا۟ بِأَمْوَٰلِكُمْ وَأَنفُسِكُمْ فِى سَبِيلِ ٱللَّهِ ۚ ذَٰلِكُمْ خَيْرٌۭ لَّكُمْ إِن كُنتُمْ تَعْلَمُونَ ﴾

“Go forth to war, whether it be easy or difficult [for you], and strive hard in God's cause with your possessions and your lives: this is for your own good -if you but knew it!”

Go forth light and heavy! that is energetically or not; it is also said to mean go forth strong or weak or rich or poor — but this was abrogated by the verse The weak would not be at fault … Q. 991. Struggle in the way of God with your possessions and your lives that is better for you if only you knew that it is better for you; so do not sink down heavily.