al-Ṣaff 61:4

Inna'llāha yuḥibbu'lladhīna yuqātilūna fī sabīlihi ṣaffan ka-annahum bunyānun marṣūṣ

"Truly God loves those who fight in His way in rank, as though they were a structure sealed with lead."

Note the sequence:

• Verse 3: كَبُرَ مَقْتًا — a great revulsion in the sight of God.
• Verse 4: إِنَّ ٱللَّهَ يُحِبُّ — God loves.

Two words of feeling, one after the other, in exact opposition. Immediately after saying what it is revolted by, the Qurʾān says what it loves.

This is the most important structural move in the sūra. When a fault has been diagnosed there are two roads: to describe the fault in greater detail, or to show what the faultless state looks like. The sūra chooses the second — and it does so not as a piece of advice but as an image.

Root ص-ف-ف. Its concrete sense: to set several things side by side on a straight line, in one alignment.

Derivatives:

• مَصْفُوف — set in rows. The Qurʾān uses it in describing the garden: "cushions set in rows" (al-Ghāshiya 88/15).
• ٱلصَّٰٓفَّٰت — those drawn up rank upon rank (al-Ṣāffāt 37/1).
• And of birds: "Have they not seen the birds above them, spreading their wings out (ṣāffāt) and folding them?" (al-Mulk 67/19). A bird's spreading its wing and holding it steady is named with this root too.

At the centre of the root are two things: alignment and being side by side. A rank is not a random crowd; everyone's place is fixed and everyone stands on the same line.

The word صَفًّا stands in the sentence as a circumstantial accusative: "those who fight in rank". What is praised, then, is not fighting but fighting in rank. The caveat is placed not on the deed but on the form of the deed.

The caveat فِى سَبِيلِهِۦ must not be passed over either: "in His way". Not every fight.

بُنْيَان — root ب-ن-ي: to build, to construct. Bunyān is a structure that has been built. And from the same root comes ٱبْن (son); lineage too has been thought of as a structure.

مَّرْصُوص — root ر-ص-ص. And the sense of the root: to fasten things tightly to one another, to join them so that no gap is left between them.

In the classical commentaries, when this word is explained, reference is made to رَصَاص (lead) from the same root, and marṣūṣ is explained as "sealed with lead". The technique behind this is real: in stone buildings, to bind the blocks to one another, sockets were cut into the stones, metal clamps were set between them, and molten lead was poured over them. As the lead cooled it filled the gaps; the two stones behaved as a single piece. This technique was widespread in the buildings of the ancient and of the Islamic period.

The image the word carries is for this reason very concrete: a structure with no gap left between its parts.

Care is needed here, because the comparison is not point for point, and if it is taken point for point it is misunderstood.

A building is motionless. A battle rank, by contrast, moves. The aspect being compared, therefore, cannot be motionlessness.

The aspect being compared is the absence of gaps. And this has three consequences:

First: a gap is the point at which a structure collapses. In a wall, the gap between the stones is the place where the load cannot be transferred; the structure breaks there. It is the same in a battle rank: the weakest place in the line is the place where someone does not hold his position.

Second: no single part can stand on its own. In a building each stone is in its own place, but none of them is a building by itself. The load is shared. The comparison describes not individual heroism but mutual dependence.

Third: what seals them together is not the stones themselves. The lead comes from outside and fills the gap. This detail of the comparison is worth dwelling on: what makes a community a community is not the qualities of its members but the bond between them.

كَأَنَّ — "as though". The particle says that the comparison is not full identity. People are not stones; it is their standing that is like stone.

And now we come to the link that lights up the whole of the sūra.

Why does this comparison come immediately after the diagnosis of "not doing what one says"? The answer lies in a technical observation:

In a battle rank each man stands trusting that the man beside him will hold his position.

The rank is the physical form of mutual trust. A soldier flees because, if the man beside him flees, his flank will be left open; he holds if he knows the man beside him will hold. The strength of the rank, then, comes not from individual courage but from the expectation that a word given will be kept.

So then: every point of a line built out of people whose declaration and deed do not agree is a candidate for a gap. The fault in the second and third verses is not merely a moral deficiency; it is the reason the structure of the fourth verse becomes impossible.

And the words themselves establish this link. The meaning of marṣūṣ was "to leave no gap". The distance between word and deed is likewise a gap. In two verses the sūra speaks of a gap; in the third it praises the absence of gaps. Two levels of the same concept: the gap inside the person, and the gap in the rank.

I present this reading as my own inference; the verse does not establish this link explicitly. But that the two verses come one after the other, and that the words overlap this closely, is worth noting.

Look once more at the construction of the sentence: إِنَّ ٱللَّهَ يُحِبُّ ٱلَّذِينَ يُقَٰتِلُونَ — the object of the love is not a deed but those who do the deed.

This is the same structure as the closing of al-Mumtaḥana 60/8: "God loves those who deal justly" — there too the object was a type of person. When the Qurʾān ties love not to the act but to the actor, it records the act as a character: not a piece of work done but a state one is in.