It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Nothing is more beloved to Allah than two drops and two marks: a drop of tears shed out of fear of Allah, and a drop of blood shed in the path of Allah. As for the two marks: one is a mark (a wound received) in the path of Allah, and the other is a mark (left) in fulfilling one of the obligations of Allah."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7887