It was the practice of the Prophet (peace and blessings be upon him):
"Whatever was asked of him (peace and blessings be upon him), he would not refuse to give it."
Hadith Referenceصحیح الجامع الصغیر / حرف الكاف / 4871
Hadith Gradingالألبانی:صحيح
Hadith Takhrij[حم] عن أبي أسيد الساعدي. الصحيحة ٢١٠٩: أبو الشيخ.