Sayyiduna Ibn Umar (may Allah be pleased with them both) says that the Prophet (peace and blessings be upon him) said: "Whoever helps his Muslim brother before a ruler, or eases a hardship, will be helped across the Sirat on the Day of Resurrection, when feet will slip."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قتال أهل البغي / 16680