Hadhrat Umar (Radhiyallahu anhu) vomits out milk of Sadaqah

A person once brought some milk for Hadhrat Umar (Radhiyallaho anho]. When he took it, he noted its queer taste, and asked the person as to how he had come in possession of the milk. He replied:

"The camels given in Sadaqah were grazing in the desert, and the attendants gave me this milk out of what they got from them."

Upon this, Hadhrat Umar (Radhiyallaho anho) put his hand in his throat and vomited all that he had taken.
These God-fearing people not only totally abstained from 'haraam' food, but were most anxious to avoid any doubtful morsel finding its way inside them. They could not dare taking anything that was 'haraam', which is so usual these days.