Why does the Qur'an describe mountains as pegs (awtād)?
Answer
Stand still for a moment and notice what you are standing on: ground that does not pitch or roll beneath you, a floor steady enough that you forget it is there. In 78:7 Allah says, "and the mountains as pegs (awtād)" — and that quiet steadiness under your feet is the mercy this verse names. The classical commentators explain awtād by analogy to tent-stakes: just as pegs hold a tent firm, the mountains were set in the earth to steady it. Al-Saʿdī and Ibn Kathīr both say the mountains anchor the earth so it does not sway or quake with its inhabitants, while al-Ṭabarī and al-Qurṭubī give the lexical sense of awtād as stakes driven down to fix something in place. The image is functional and evocative, conveying stability and God's provision rather than offering a geological theory. Many readers note that this language of mountains "steadying" the earth resonates with the modern understanding that large mountain ranges have deep crustal roots and extend far below the surface, not just above it. That resonance is worth appreciating, but it is not where the verse rests its case. The verse rests on something you can feel without a single instrument: the ground holds. And the point of listing it is an argument running through the whole surah — the One who pegged the mountains so the earth would carry you in peace is the same One who can raise the dead. The steadiness under your feet is His signature; it is asking you to trust the One who wrote it.
Qur’anic evidence — read the full study of 78:6 →
In more depth
Notice the relief first — before any argument. The ease of standing on solid earth after a tremor, the way the body unclenches when the ground goes quiet again, the instinct to call it "firm" and "sure." The same mercy recurs in 16:15 and 31:10, where mountains are described as cast into the earth firmly set so that it would not shake with its people — and each time the emphasis falls not on rock but on you, on the people who would otherwise be unsettled. The mountains are framed as a kindness aimed squarely at human life, as if your footing mattered to Him. And some part of you already knew that before you read it. That recognition — the ground given so you could stand, and the gratitude that rises before the mind has named its source — that is the fitra knowing a Provider. The mountains were set so you could stand; the verse is simply inviting you to stand, finally, with Him.