29. They practiced deceptions regarding the sign of the famine that had been inflicted on them (Ayats 11, 12). This verse alludes to the same, as if to say, “How dare you demand a sign again, whereas recently the sign of the famine has been shown to you? At that time you invoked the help of your deities but in vain, though you had set them up as intercessors with Allah and believed that offerings to their shrines would prove very effective in removing the famine. But you yourselves learned by the first hand experience that those so called gods possessed no power at all. Therefore when you were convinced that all power belongs to Allah alone, you turned to Him and began to invoke His help. This experience ought to have convinced you of the truth of the Message of Muhammad (peace be upon him) for this was the very fundamental thing which he was teaching. Instead of learning a lesson from this sign, you began to practice deceptions to explain it away, as soon as the famine was over and there had come the blessed rainfall. You invented many explanations (deceptions) concerning the causes of the famine and its subsequent end in order to escape from the doctrine of Tauhid and stick to your shirk. The verse is meant to declare that no sign would convince such people as those who had not benefited from the great sign of the famine. Therefore there was no use of showing any sign to them.
30. “Allah is more swift in plotting” means this: If you practice deceptions in order to explain away the sign of the famine so that you might find excuses to evade the implications of its acceptance in order to continue your rebellious attitudes. Allah is more swift in carrying out His plans to outdo your deceptive methods. He will leave you free to move in your wrong ways. He will even bestow upon you the worldly prosperity, which will so delude you that you will forget that you were being closely watched. And you will commit evil deeds with apparent immunity and enjoy yourselves to your heart’s content. But His angels will go on keeping a full and complete record of your deeds, which will be presented for your prosecution after your death.