Al-Mu'jam al-Awsat 4396 — they both said: Whoever walks to fulfil

It is narrated from Sayyiduna Abdullah bin Umar and Sayyiduna Abu Hurayrah (may Allah be pleased with them both) that they both said: "Whoever walks to fulfil a need of his Muslim brother, Allah Almighty shades him with seventy-five thousand angels who pray for him, and he keeps wading in mercy until he finishes (that task); then when he finishes, Allah Almighty records for him (the reward of) a Hajj and an Umrah. And whoever visits a sick person, Allah Almighty shades him with seventy-five thousand angels; he does not lift a foot except that a good deed is recorded for him in return, and he does not put down a foot except that a sin of his is erased in return and he is raised a degree by it, until he sits down (with the sick person). Then when he sits, mercy covers him, and he remains continuously in that state on his way back until he reaches his home."
This hadith is narrated from Ibn Umar (may Allah be pleased with them both) only with this chain.