“It was a stone that was thrown into Hell seventy years ago and it was falling through Hell until now.”
According to a tradition by Hazrat Abu Hurairah (رضی اللہ عنہ), “Once we were sitting in the congregation of the Prophet Muhammad (ﷺ) and he heard the sound of something falling. The Prophet (ﷺ) said, "Do you know what that was?" We said, "Allah and His Messenger know best". He said, "That was a stone that was thrown into Hell seventy years ago and it was falling through Hell until now". Previously, people believed that it was exaggeration that the stone reached the depth of hell after seventy years. But now according to scientific progress it says that there are many stars whose light is travelling towards earth since their creation but it has not reached the earth until now. Allah’s creations are so expanded that it’s not far from reason if a stone reached the depth of hell after seventy years. However, the purpose of this Hadith is to describe the expanse of hell. [Reference: Spiritual purification]
Trust of an ant: Hazrat Imam Nasfi (رحمت اللہ علیہ) told that once Hazrat Salman (علیہ السلام) asked an ant, “How much is your livelihood for throughout the year”? “One grain” it replied. He locked the ant in a vial and put one grain in it. When he saw her after one year, it had eaten only half of the grain. He asked the reason. The ant said, “Previously, I had trust in Allah but now I s afraid that you may not forget. That’s why I ate half of the grain and kept half of it for the next year”. (Tareeqa-e-Hajj, S289)