Verse 13: But surely they will carry their own burdens and other burdens along with their own burdens, and they will surely be questioned on the Day of Resurrection concerning that which they used to fabricate. No act can be attributed to anyone else because: (a) actions are living (b) they are inseparably linked to their doers! [These people are astray and they are making others also go astray. This means they will be punished twice. Once for doing what is wrong and secondly for misguiding others. The fact is that if you followed them in doing wrong you will also be punished. Verse 14: Certainly We sent Nuh to his people, and he remained with them for a thousand-less-fifty years. Then the flood overtook them while they were wrongdoers. Allah (swt) eloquently highlights the length of his tabligh. But 1000 is a rounded off number and is more appealing. Removing 50 does not really reduce the magnitude of 1000. The use of ‘sanah’ and ‘aam’ both mean ‘years’ is used to avoid unnecessary repetition and is a sign of the eloquence of the Holy Qur’an.