Hazrat Saeed bin Al-Musayyib says that a slave should not give charity to his father or mother without the master's permission.

Hazrat Dirham narrates that I asked Hazrat Abu Hurairah, "My master gives me one dirham a day. Can I give it in charity?" He replied, "It is not permissible for you to give anything from your blood or your wealth in charity without your master's permission. So, just feed a morsel to the needy (this is sufficient for you)."

Hazrat Ata says that a slave will not give charity without the permission of his master.

Hazrat Ismail bin Sulaiman says that I was present with Hazrat Sha’bi when a slave asked him,“I earn such and such amount, and from it my master takes such and such portion. Can I give charity from it?”He replied,“(If you give charity) its reward will be for your master.”

Hazrat Amr bin Aas would order something to be given to a poor person, and if that was not available, he would leave it and grant something else in its place.

Hazrat Ikrimah would instruct to give some food item to a needy person, and if that item could not be found, he himself would not consume it either, but would give it in charity.

Hazrat Amr bin Saeed narrates that a man asked Hazrat Humaid bin Abdur Rahman for something. Hazrat Humaid said to him, "You seem misguided and I find you to be a Christian." (In Arabia, a tribe that goes astray and adopts Christianity is called 'Abadi.') Then he ordered something to be given to him, but the man considered it too little and refused to take it. Hazrat Humaid said, "If you want, accept it; otherwise, we will give it to someone else." Then he said, "Give to the beggar (give him), even if it is only the small head of a bird (partridge)."

A person asked Hazrat Taawoos that if someone takes something out to give to a beggar, but the beggar disappears and he cannot find him later, then what should he do? He replied: He should give it to someone else.

Ibrahim was asked: If a person goes out to give charity to a poor person, but that poor person passes away before receiving it, what should he do? He replied: He should give it to another poor person, and that will suffice. And he should not take back what Allah the Exalted has destined (decreed) for him.

Hazrat Ibn Sirin says that when you go out carrying something (a piece) for a beggar and do not find him, then keep that thing with you until someone else comes.