Plan B

But Abram said, “O Sovereign Lord, what can you give me since I remain childless and the one who will inherit my estate is Eliezer of Damascus?” And Abram said, “You have given me no children; so a servant in my household will be my heir.”
Then the word of the Lord came to him: “This man will not be your heir, but a son coming from your own body will be your heir.” He took him outside and said, “Look up at the heavens and count the stars—if indeed you can count them.”
Then he said to him, “So shall your offspring be.”
Genesis 15:2-4

God Himself promised Abram (Abraham) and Sarai (Sarah) a son, but the Lord did not tell them when it would happen. After years of waiting for what they perceived as being patient without the promise (Plan A) being fulfilled, they decided to resort to "Plan B", a plan of their own, to "help God" along...

"Now Sarai, Abram's wife, had borne him no children. But she had an Egyptian maidservant named Hagar; so she said to Abram, “The Lord has kept me from having children. Go, sleep with my maidservant; perhaps I can build a family through her.”
Abram agreed to what Sarai said. So after Abram had been living in Canaan ten years, Sarai his wife took her Egyptian maidservant Hagar and gave her to her husband to be his wife. He slept with Hagar, and she conceived."
Genesis 16:1-4

Jeremiah 29:11 tells us that God has a plan for our lives, a plan for our benefit, for our good, not for evil. When a word is spoken over us, when Plan A (God's will) is revealed, patience, trust, and obedience must be exercised. The Word says that "Abraham believed God and it was credited to him as righteousness", and yet he grew tired of waiting, doubt crept in, replacing faith and trust. The result was disastrous, the result was Illigetimacy manifested in rebellion in the descendants of Ishmael. Throughout history the world has paid a heavy price ever since, and contention between the children of Abraham through Isaac (the eventual Plan A), and those descended through Ishmael, the impetuous result of a "Plan B".
We know this and many other passages where a "Plan B" was chosen with negative outcomes!
They stand as lessons for us on what not to do! Why then do the people of God (including myself) sometimes grow so impatient, and seek to "help God out", taking up their own plans?
The Scriptures tell us to persevere, endure, wait on the Lord, sticking to the Lord's plan of our lives.
Beloved, stick to Plan A, God's plan, even if we have not seen the fruit yet...scrap any other plan.
He is faithful to complete it.