Surah As-Saf 61:11

تُؤْمِنُونَ بِٱللَّهِ وَرَسُولِهِۦ وَتُجَـٰهِدُونَ فِى سَبِيلِ ٱللَّهِ بِأَمْوَٰلِكُمْ وَأَنفُسِكُمْ ۚ ذَٰلِكُمْ خَيْرٌ لَّكُمْ إِن كُنتُمْ تَعْلَمُونَ

[It is that] you believe in Allāh and His Messenger and strive in the cause of Allāh with your wealth and your lives. That is best for you, if you only knew.

Translation: Saheeh International

Tafsir

You should believe you should maintain faith in God and His Messenger and struggle for the cause of God with your possessions and your lives. That is better for you should you know that it is better for you then do it.

Excerpt from Tafsir al-Jalalayn, commentary on 61:11, via Quran.com. The reader has the full commentary and 9 more tafsirs.