Allah said:

﴿وَمِنَ النَّاسِ مَن يَشْرِى نَفْسَهُ ابْتِغَآءَ مَرْضَاتِ اللَّهِ﴾

(And of mankind is he who would sell himself, seeking the pleasure of Allah.)

After Allah described the evil characteristics of the hypocrites, He mentioned the good qualities of the believers. Allah said:

﴿وَمِنَ النَّاسِ مَن يَشْرِى نَفْسَهُ ابْتِغَآءَ مَرْضَاتِ اللَّهِ﴾

(And of mankind is he who would sell himself, seeking the pleasure of Allah.)

Ibn `Abbas, Anas, Sa`id bin Musayyib, Abu `Uthman An-Nahdi, `Ikrimah and several other scholars said that this Ayah was revealed about Suhayb bin Sinan Ar-Rumi. When Suhayb became a Muslim in Makkah and intended to migrate (to Al-Madinah), the people (Quraysh) prevented him from migrating with his money. They said that if he forfeits his property, he is free to migrate. He abandoned his money and preferred to migrate, and Allah revealed this Ayah about him. `Umar bin Khattab and several other Companions met Suhayb close to the outskirts of Al-Madinah at Al-Harrah (flat lands with black stones). They said to him, "The trade has indeed been successful.'' He answered them, "You too, may Allah never allow your trade to fail. What is the matter'' `Umar told him that Allah has revealed this Ayah (2:207) about him. It was also reported that Allah's Messenger said, "The trade has been successful, O Suhayb!''

The meaning of the Ayah (2:207) includes every Mujahid in the way of Allah. Allah said in another Ayah:

﴿إِنَّ اللَّهَ اشْتَرَى مِنَ الْمُؤْمِنِينَ أَنفُسَهُمْ وَأَمْوَلَهُمْ بِأَنَّ لَهُمُ الّجَنَّةَ يُقَـتِلُونَ فِى سَبِيلِ اللَّهِ فَيَقْتُلُونَ وَيُقْتَلُونَ وَعْدًا عَلَيْهِ حَقًّا فِي التَّوْرَاةِ وَالإِنجِيلِ وَالْقُرْءانِ وَمَنْ أَوْفَى بِعَهْدِهِ مِنَ اللَّهِ فَاسْتَبْشِرُواْ بِبَيْعِكُمُ الَّذِى بَايَعْتُمْ بِهِ وَذَلِكَ هُوَ الْفَوْزُ الْعَظِيمُ ﴾

(Verily, Allah has purchased of the believers their lives and their properties for (the price) that theirs shall be the Paradise. They fight in Allah's cause, so they kill (others) and are killed. It is a promise in truth which is binding on Him in the Tawrah and the Injil and the Qur'an. And who is truer to his covenant than Allah Then rejoice in the bargain which you have concluded. That is the supreme success.) (9:111)

When Hisham bin `Amr penetrated the lines of the enemy, some people criticized him. `Umar bin Al-Khattab and Abu Hurayrah refuted them and recited this Ayah:

﴿وَمِنَ النَّاسِ مَن يَشْرِى نَفْسَهُ ابْتِغَآءَ مَرْضَاتِ اللَّهِ وَاللَّهُ رَءُوفٌ بِالْعِبَادِ ﴾

(And of mankind is he who would sell himself, seeking the pleasure of Allah. And Allah is full of kindness to (His) servants.)

﴿يَـأَيُّهَا الَّذِينَ ءَامَنُواْ ادْخُلُواْ فِي السِّلْمِ كَآفَّةً وَلاَ تَتَّبِعُواْ خُطُوَتِ الشَّيْطَـنِ إِنَّهُ لَكُمْ عَدُوٌّ مُّبِينٌ ﴾

﴿فَإِن زَلَلْتُمْ مِّن بَعْدِ مَا جَآءَتْكُمُ الْبَيِّنَـتُ فَاعْلَمُواْ أَنَّ اللَّهَ عَزِيزٌ حَكِيمٌ ﴾

(208. O you who believe! Enter Silm perfectly, and follow not the footsteps of Shaytan (Satan). Verily, he is to you a plain enemy.) (209. Then if you slide back after the clear signs (Prophet Muhammad , and this Qur'an and Islam) have come to you, then know that Allah is All-Mighty, All-Wise).