Silsilah as-Sahihah 415 — Blowing nose three times after waking before

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When any one of you wakes up from sleep and performs ablution, he should blow his nose three times, for indeed Satan spends the night at the root of his nose."