Salah bin Kaysan al-Madni صالح بن كيسان المدني أبو محمد · The Book of Zakah

"I undertook a financial responsibility. Then I came to the Prophet and asked him (for help) concerning that. He said: 'Asking (for money) is not permissible except for three: A man who undertakes a financial responsibility between people; he may ask for help with that until the matter is settled, then he should refrain (from asking)."'