It is narrated from Sayyiduna Abu Mas'ud al-Ansari (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Send blessings upon me abundantly on the day of Friday, for whoever sends blessings upon me on the day of Friday, his blessing is presented to me." This hadith has a sahih (authentic) chain of narration (since Abu Rafi' here refers to Isma'il bin Rafi'), but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) that when a quarter of the night had passed, the Messenger of Allah (peace and blessings be upon him) would stand and say: "O people, remember Allah! O people, remember Allah! The Quaking (the Hour) has come, followed by the one that comes after it. Death has come with its agonies; death has come with its agonies." Ubayy bin Ka'b (may Allah be pleased with him) said: O Messenger of Allah, I send blessings upon you abundantly; how much of my supplication should I devote to you (for sending blessings)? He (peace and blessings be upon him) said: "As much as you wish." I said: A quarter? He (peace and blessings be upon him) said: "As much as you wish, but if you do more than that, it is better for you." I said: Half? He (peace and blessings be upon him) said: "As much as you wish, but if you do more than that, it is better for you." I said: Two-thirds? He (peace and blessings be upon him) said: "As much as you wish, but if you do more than that, it is better for you." I said: O Messenger of Allah, shall I devote all of my supplication to you (for sending blessings)? He (peace and blessings be upon him) said: "Then it will suffice for your worries, and your sins will be forgiven." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.