Luqman 31:16 يا بني انها ان تك مثقال حبة من خردل فتكن في صخرة او في السماوات او في الارض يات بها الله ان الله لطيف خبير ١٦

This is useful advice which Allah tells us Luqman gave, so that people may follow it and take it as"See the full heading "This is useful advice which Allah tells us Luqman gave, so thatpeople may follow it and take it as a good example

He said:

يبُنَىَّ إِنَّهَآ إِن تَكُ مِثْقَالَ حَبَّةٍ مِّنْ خَرْدَ