"Agreed," she replied. "Let it be as you say." So she sent them away and they departed. And she tied the scarlet cord in the window. (Joshua 2:21)
Rahab was a prostitute who hid the Israelite spies sent by Joshua to spy the land of Jericho. She was kind to them and saved them from the king's soldiers who came searching for them at the command of the king. She acknowledged the sovereignty of God Almighty and requested them to show kindness to her and her family when Joshua and the Israelites took over the land. They agreed, but also told her, " "This oath you made us swear will not be binding on us unless, when we enter the land, you have tied this scarlet cord in the window through which you let us down, and unless you have brought your father and mother, your brothers and all your family into your house. (Joshua 2:17, 18)
And she said, According unto your words, so be it. And she sent them away, and they departed: and she bound the scarlet line in the window. (Joshua 2:21)
Tying the scarlet line in the window turned out to be a great blessing to her and her family, for when Joshua and the Israelites invaded and destroyed Jericho, she and her whole family were saved.
Notable here is the fact that she tied the scarlet line soon after she let down the spies. Perhaps she could have waited and pondered over what the spies had said; perhaps held a discussion with her family, before tying the line, but no; she did not waste time. She did what she had to, for the deliverance of her family.
Oh, I forgot, is what we hear from many mouths, regarding important spiritual matters. But that can be avoided, if we choose to act wisely saving precious time.
Another thing that we can learn from her story is that God doesn't forget the good that one does for His children or His servants. He remembers and rewards bountifully in his wonderful ways.
Here's an exhortation from the writer of Hebrews to all...
God is not unjust; he will not forget your work and the love you have shown him as you have helped his people and continue to help them. We want each of you to show this same diligence to the very end, in order to make your hope sure. We do not want you to become lazy, but to imitate those who through faith and patience inherit what has been promised. (Hebrews 6:10-12)