declines

And on that night it is dark _in_ its fourteen portions, that is, _in each_ half; but it rises on that day with one seventh portion precisely, and in its progress declines from the rising of the sun.

Again it returns to the gate whence the sun goes forth, and in that completes the whole of its light. Then it declines from the sun, and enters in eight days into the sixth gate, _and returns in seven days to the third gate_, from which the sun goes forth.

Again it returns in seven days to the fourth gate, and completing all its light, declines, and passes on by the first gate in eight days;