Wa-itha ma onzilat sooratun nathara baAAduhum ila baAAdin hal yarakum min ahadin (surah Tawbah: 127)

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(9:127) When a Surah is sent down, they cast looks at one another, asking, "Is anyone watching you?" Then they silently slip away: *126 Allah has turned away their hearts for they are a people who do not understand. *127

Wa izaa maaa unzilat Sooratun nazara ba`duhum ilaa ba`din hal yaraakum min ahadin summman sarafoo; sarafal laahu quloobahum bi annahum qawmul laa yafqahoon

*126) This happened when the hypocrites had to attend a meeting that was specially hold for the recital of some new surah. The Holy Prophet used to recite as an address every new surah before the assembly. The true believers would listen to it very attentively and respectfully. But the hypocrites, who had to attend the meeting to show that they were "Muslims', would sit listlessly in the meeting for they had no interest in the recital. But when they would be assured that their "attendance" had been marked, they would look for an opportune moment to slip away without being seen and noticed.
*127) "Allah has turned away their hearts from the Qur'an, because they do not understand that it is in their own interest to listen to the Qur'an and to act upon its teachings. These foolish people do not realize that by ignoring the Qur'an and the Holy Prophet, they in fact, deprive themselves of a great blessing. As they are deeply engaged in their own narrow interests, they do not see that the great knowledge of the Qur'an and the right guidance of the Holy Prophet has the potentiality of making them the leaders of this world, and of bringing salvation to them in the Next World. As a result of their folly and neglect of the great blessing, Allah has, in accordance with His Law, deprived them of the capacity of making use of this blessing and "turned away their hearts" from it. That is why these unfortunate, people do not even feel the great loss they are suffering, while the blessed people are taking full advantage of this great fountainhead of power and strength and are preparing themsleves for achieving the greatest success that human beings could ever achieve.