The Prophet (peace and blessings be upon him) said:
"Indeed, among the purest things a person eats is what comes from his own earnings, and his children are also part of his earnings."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 2208
Hadith Gradingالألبانی:صحيح
Hadith Takhrij[د ك] عن عائشة. أحاديث البيوع: حم، ن، ت، الدارمي، ابن ماجه، الطيالسي.