In Syriac Christianity, the Fast of Nineveh (Classical Syriac: ܒܥܘܬܐ ܕܢܝܢܘܝ̈ܐ Bā'ūṯā ḏ-Ninwāyē, literally "Petition of the Ninevites") is a three-day fast starting the third Monday before Clean Monday from Sunday Midnight to Wednesday noon, during which participants usually abstain from all dairy foods and meat products.

However, some observe the fast more rigorously and abstain from food and drink altogether from Sunday midnight to Wednesday after Holy Qurbana, which is celebrated before noon.

These documented events suggest that Jonah's words were given credibility and adhered to, with everyone allegedly cutting off from food and drinks, including animals and children.

However Jonah is not a historically attested figure, and does not appear in contemporary written records of the time he is alleged to have lived.

in an effort to alleviate the suffering and affliction of those persecuted by ISIS in the region of Nineveh and the rest of the Middle East.