I heard the Messenger of Allah ﷺ say, "In every human being there are three hundred and sixty joints, and he must give charity on behalf of each one of them."They asked, "Who is capable of that, Prophet of Allah?"He replied, "Spittle in the mosque that you bury, or something harmful that you remove from the road. If you cannot find such a thing, then the two rakahs of Duha will suffice you."
حدثنا أحمد بن محمد المروزي قال حدثني علي بن حسين قال حدثني أبي قال حدثني عبد الله بن بريدة قال سمعت
سمعت رسول الله ﷺ يقول في الإنسان ثلاث مائة وستون مفصلا فعليه أن يتصدق عن كل مفصل منه بصدقة قالوا ومن يطيق ذلك يا نبي الله قال النخاعة في المسجد تدفنها والشيء تنحيه عن الطريق فإن لم تجد فركعتا الضحى تجزئك
Its chain of transmission is hasan. Ahmad narrated it (5/354) from the hadith of Husayn bin Waqid, transmitted through him. Ibn Khuzayma graded it sahih, h: 1226, as did Ibn Hibban, h: 633, 811, and the hadith has corroborating narrations.