Musannaf Ibn Abi Shaybah

Hazrat Abdullah bin Amr (may Allah be pleased with him) narrates that if someone is asked for something by invoking Allah’s name and he gives to the one who asked, then he will have seventy (70) rewards.

Hazrat Yazid, who is the servant of Hazrat Salamah, narrates that whenever anyone would ask Hazrat Salamah for something by invoking Allah's name, he would give it to him, but he disliked this and would say that this (not being patient over hunger and asking people) is persistence in begging.

It is narrated from Hazrat Abdullah bin Umar (may Allah be pleased with them both) that the Noble Prophet (peace and blessings be upon him) said: Whoever asks by invoking Allah’s name, he should be given.