It is narrated from Mujahid (may Allah have mercy on him) regarding the saying of Allah Almighty "And let those fear who, if they left behind weak offspring" [Surah al-Nisa: 9] that this is at the time of making a bequest: whoever comes to him says: Make a bequest for so-and-so and for the family of so-and-so. Allah says: Those people should fear, and they should say what they would like to be said for their own children after them, and they should speak what is right.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الوصايا / 12583