Included in the Tablet of Ishraqát is a quotation from a Tablet Bahá'u'lláh had earlier revealed in honour of Haji Muhammad-Ibrahim concerning some of the Islamic prophecies about the Day of God. He explains to Jalil-i-Khu'i that

These are verses We sent down previously, and We have sent them unto thee, that thou mayest be acquainted with what their lying tongues have spoken, when God came unto them with might and sovereignty. [TB117-120]

The passage on Trustworthiness in the Tablet of Ishraqát is also found in the Tablet of Tarazat and in a Tablet addressed to Haji Mirza Buzurg-i-Afnan (and perhaps in other Tablets as well). [TBp121-122] This is the passage in which Bahá'u'lláh states:

One day of days We repaired unto Our Green Island.

In a Tablet addressed to Haji Amin, Bahá'u'lláh indicates that a "Tablet of Trustworthiness" had been revealed in A.H. 1296 (around 1879). [RoB4p16-17] The date of the revelation of the Tablet of Tarazat was Dhi'l-Hajjih 1305 (approximately 1888). - Bahá'u'lláh responds to Jalil-i-Khu'i's question concerning "interest and profit on gold and silver" by quoting from a Tablet that had been previously revealed in honour of Zaynu'l-Muqarrabin.[TB132-133] In a commentary on the Tablet written on behalf of the Universal House of Justice it was written, "We have not, so far, been able to determine the date on which this Tablet was revealed." [Ishraqát, Tablet of, Date of Revelation]