[suitable to them]. And no one knows its [true] interpretation except Allah. But those firm in knowledge say, "We believe in it. All [of it] is from our Lord." And no one will be reminded except those of understanding." (from verse 3:7) Only a few examples are given here. In Q7:172, the Quran states: "And when Your Lord summoned the descendants of Adam, and made them testify about themselves. "Am I not your Lord?" They said, "Yes, we testify." Thus you cannot say on the Day of Resurrection we were unaware of this." According to the above verse, before the Creation, God called the future humanity out of the loins of the not-yet-created Adam and addressed them with the words: "Am I not your Lord?", and they answered: "Yes, we witness it". In Islam, this "primordial covenant" is the metahistorical foundation between God and humankind. The Quran first mentions an 'inner meaning' (ta'wil) in Q18:65–82 in the story of Moses and Khidr, a mystical figure of the ancient Middle East who reluctantly accepts Moses as his traveling student. When Khidr performs strange acts, Moses questions him about them. Khidr gives him the 'inner explanation' (ta'wil) of his actions. Along the way, the esoteric being damages a boat belonging to poor people. Moses is so disturbed that he keeps protesting despite his agreement to keep silent. At the end of the journey, Khidr tells Moses the reasons for his inexplicable actions: "As for the ship, it belonged to poor people working at sea, so I intended to cause defect in it as there was after them a king who seized every ship by force." In Q56:79, the Quran describes itself: "This is an honorable Quran, in a book hidden, which none can touch except the purified." In the exoteric sense, the Quran requires Muslims to perform ritual cleansing of their hands before touching it. Esoteric interpreters were of the opinion that the Quran implies that individuals with spiritual purity are able to grasp its meaning. Attar of Nishapur, a 12th-century mystical poet, gives a mystical interpretation of the Quranic story of the descent of Adam and Eve from Paradise to Earth. According to Attar, "the man whose mind and vision are ensnared by heaven's grace must forfeit that same grace, for only then can he direct his face To his true Lord." Occasionally, a verse may be interpreted in a sense