It is narrated from Sayyiduna Abdullah bin Umayr al-Sadusi (may Allah be pleased with him) that he brought a water vessel from the Prophet (peace and blessings be upon him), in which the Prophet (peace and blessings be upon him) had washed his blessed face, rinsed his mouth and spat (from the rinsing) into the water, and washed his hands and forearms. Then he (peace and blessings be upon him) filled the vessel
and said: "Do not come to any water (spring) without topping up the vessel over what remains in it until it is full; then when you reach your land, sprinkle this water on that spot and make it a mosque."
The narrator says: So they made it a mosque. Amr (may Allah have mercy on him) said: "And I myself have prayed in it (that mosque)."
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is not narrated from Sayyiduna Abdullah bin Umayr al-Sadusi (may Allah be pleased with him) except with this chain, and Abdullah bin al-Muthanna (may Allah have mercy on him) is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الألف / 1957
Hadith Gradingمحدثین:فيه عمر بن شقيق وأبوه، لم يُذكر فيهما جرح ولا تعديل
Hadith Takhrij«قال الهيثمي: عمر بن شقيق ذكره هو وأبوه ابن أبي حاتم ولم يذكر فيهما جرحا ولا غيره «مجمع الزوائد ومنبع الفوائد، ج 2، ص 12»»