وَلَا تَشْتَرُواْ بِعَهْدِ اللّهِ ثَمَنًا قَلِيلًAnd do not use an oath by Allah for the purchase of little value.meaning, do not neglect an oath sworn in the Name of Allah for the sake of this world and its attractions, for they are few, and even if the son of Adam were to gain this world and all that is in it, that which is with Allah is better for him,إِنَّمَا عِندَ اللّهِ هُوَ خَيْرٌ لَّكُمْwhat is with Allah is better for you if you only knew. i.e., the reward of Allah is better for the one who puts his hope in Him, believes in Him, seeks Him and fulfills his oaths in the hope of that which Allah has promised.This is why Allah says:إِن كُنتُمْ تَعْلَمُونَ