The Hadith: 'Shall I teach you something to learn by heart'

Q: I have a question regarding a Hadith that I read in an old book. Following is its text: On the authority of Hisham ibn Harith from Ibn `Abbas (may Allah be pleased with him and his father) that the Prophet (peace be upon him) said: "Shall I teach you something to learn by heart"? He replied, "Yes, O Messenger of Allah." The Messenger (peace be upon him) said, "Write the whole Surah (Qur'anic chapter) of Al-Fatihah using saffron in a washbowl, then (write) the whole Surah of Al-Mulk, then the whole Surah of Al-Hashr, then the whole Surah of Al-Waqi`ah, then pour into the washbowl some Zamzam water, or rain water, or sea water. You should then drink this water on an empty stomach after being mixed with three Mithqals of frankincense, ten Mithqals of honey, and ten Mithqals of sugar. Afterwards, you should pray two Rak`ahs (units of Prayer) and recite in each of them Surah Al-Ikhlas fifty times after reciting Surah Al-Fatihah. Then you should observe Sawm (Fast) for the following day." Ibn `Abbas said: "I did so and I got the reward declared by the Prophet (peace be upon him)." Ibn `Abbas continued: "You will be a memorizer of the entire Qur'an in forty days. This applies to those who are younger than sixty years of age."I would like to ask Your Eminence, O Shaykh `Abdul-`Aziz ibn `Abdullah ibn Baz: Is the Hadith quoted above Sahih (authentic) or Da`if (weak)?It is worth mentioning that this Hadith is cited from the book "Khazinat Al-Asrar Al-Kubra Hilyat Al-Adhkar" (Part No. 3; Page No. 286) compiled by Muhammad Haqqy Al-Nazly. What is your opinion regarding this book?