wilderness of Shur
Genesis 16:7
And the angel of the LORD found her by a fountain of water in the wilderness, by the fountain in the way to Shur.
Genesis 25:18
And they dwelt from Havilah unto Shur, that is before Egypt, as thou goest toward Assyria: and he died in the presence of all his brethren.
1 Samuel 15:7
And Saul smote the Amalekites from Havilah until thou comest to Shur, that is over against Egypt.
three days
Exodus 3:18
And they shall hearken to thy voice: and thou shalt come, thou and the elders of Israel, unto the king of Egypt, and ye shall say unto him, The LORD God of the Hebrews hath met with us: and now let us go, we beseech thee, three days' journey into the wilderness, that we may sacrifice to the LORD our God.