(So let the Children of Israel go with us, and torment them not; indeed, we have come with a sign from your Lord! And peace will be upon him who follows the guidance!") (20:47)
فَمَا بَكَتْ عَلَيْهِمُ السَّمَاءُ وَالْأَرْضُ "So, neither the sky and earth wept over them... (44:29) ". This means they did not perform any righteous deeds on earth which would weep for them when they died, nor did any of their righteous deeds ascend through the gates of heaven, so that the sky would weep on their death. There are several ahadith which confirm that when a righteous person dies, the heaven and earth weep. Hafiz Abu Ya` la reports on the authority of Sayyidna Anas ؓ that the Prophet of Allah ﷺ said: "For every person there are two gates in the heaven/sky. Through one of them his sustenance descends, and through the other his deeds and his conversation ascend. When he dies, the gates remember him and weep. Then the Prophet ﷺ recited the following verse as an evidence of his statement: فَمَا بَكَتْ عَلَيْهِمُ السَّمَاءُ وَالْأَرْضُ So, neither the sky and earth wept over them...(44:29) ". Similar reports are narrated on the authority of Sayyidna Ibn ` Abbas (Ibn Kathir). Sayyidna Shuraih Ibn ` Ubaid al-Hadrami ؓ narrates that the Holy Prophet ﷺ said: "If a believer dies away from home where there is no one to weep for him, the heaven and earth weep for him." On this occasion too, the Holy Prophet ﷺ recited the same verse (29), adding that neither the sky nor the earth weeps for a non-believer. (Ibn Jarir). Sayyidna ‘Ali ؓ also upholds that the heaven and earth weep for a righteous person. (Ibn Kathir).
After prolonged effort on the part of Moses to bring Pharaoh’s people to the right path, by preaching the word of God, his assignment to issue the call for the Truth came to an end. At that time, Moses was instructed to leave Egypt and move out along with his people (the Children of Israel). Accordingly, Moses set out and journeyed until he reached the banks of the Red Sea. The waters parted for him and a path appeared for him to cross over. Pharaoh and his army were in hot pursuit of Moses and the Children of Israel. When Pharaoh saw a path being formed across the Sea, he thought that he could also cross it, just as Moses had done. But the path across the Sea was not simply a path in the ordinary sense. The waters had parted by the commandment of God and God’s commandment was for the deliverance of Moses and the destruction of Pharaoh. So, when Pharaoh and his army entered the Sea, the waters rushed upon them from either side of the path and rose to their former level. Pharaoh was drowned along with his army. One who receives the good things of life in this world often considers them as his personal possessions, though in reality, they do not rightly belong to him. God may give them to anybody whenever He wishes, then, taking them away from him, may give them to somebody else, just as He pleases.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.