Three Precious Advice that Fuqaha used to give each others...

وروى أبو نعيم في الحلية عن عون بن عبد الله قال: "كان الفقهاء يتواصون بينهم بثلاث، و يكتب بذلك بعضهم إلى بعض:
1 - من عمل لاخرته كفاه الله لدنياه
2 - و من أصلح سريرته أصلح الله علانيته
3 - و من أصلح ما بينه و بين الله أصلح الله ما بينه و بين الناس
" 

Abu Na'yem reported in "the Hilya" from 'awan bin Abdullah that he said: The fuqaha (Scholars of fiqh) used to advice amongst them with three (things), and used to write with that some of them to the other: 

1 - Whoever works for the hereafter, Allah will suffice for him for his worldly [matters].
2 - and whoever rectifies his inside, Allah will rectify for him his outside[matters]. 
3 - and whoever rectifies what is between him and Allah, Allah will rectify what is between him and the people. 

Taken from the book: "20 advices for my sister before her marriage" - page 10.