Matthew Henry on Nehemiah 2:1-8
When Nehemiah had prayed for the relief of his countrymen, and perhaps in David's words (Psa 51:18, Build thou the walls of Jerusalem), he did not sit still and say, "Let God now do his own work, for I have no more to do," but set himself to forecast what he could do towards it. our prayers must be seconded with our serious endeavours, else we mock God. Nearly four months passed, from Chisleu to Nisan (from November to March), before Nehemiah made his application to the king for leave to go to Jerusalem, either because the winter was not a proper time for such a journey, and he would not make the motion till he could pursue it, or because it was so long before his month of waiting came, and…
Read the whole note in the consoleJamieson-Fausset-Brown on Nehemiah 2:2
the king said unto me, Why is thy countenance sad?--It was deemed highly unbecoming to appear in the royal presence with any weeds or signs of sorrow (Est 4:2); and hence it was no wonder that the king was struck with the dejected air of his cupbearer, while that attendant, on his part, felt his agitation increased by his deep anxiety about the issue of the conversation so abruptly begun. But the piety and intense earnestness of the man immediately restored [Nehemiah] to calm self-possession and enabled him to communicate, first, the cause of his sadness (Neh 2:3), and next, the patriotic wish of his heart to be the honored instrument of reviving the ancient glory of the city of his fathers.
Adam Clarke on Nehemiah 2:3
Let the king live for ever - Far from wishing ill to my master, I wish him on the contrary to live and prosper for ever. Aelian, Hist. Var. lib. i. c. 32, uses the same form of speech in reference to Artaxerxes Mnemon, one of the Persian kings, Βασιλευ Αρταξερξη, δι' αιωνος βασιλευοις, "O King Artaxerxes, may you reign for ever," when speaking of the custom of presenting them annually with an offering of earth and water; as if they had said, May you reign for ever over these!
John Gill on Nehemiah 2:3
And I said unto the king, let the king live for ever,.... Which some think he said to take off the king's suspicion of his having a design upon his life, though it seems to be a common salutation of the kings in those times, see Daniel 6:6,
why should not my countenance be sad, when the city, the place of my fathers' sepulchres, lieth waste, and the gates thereof are consumed with fire? a man's native place, and where his ancestors lie interred, being always reckoned near and dear, the king and his nobles could not object to his being concerned for the desolations thereof.