2 Kings 4:23

it is neither new moon, nor sabbath These were the principal occasions of assembling for worship, and it is clear from this history that even in Israel, while the house of Ahab was still on the throne, religious services were regularly held by the prophets in the name of Jehovah. The prophets performed all the duties of the priesthood where it was impossible to have the services of priests or Levites. Thus Elijah sacrificed on Mt Carmel before the slaughter of the priests of Baal (1 Kings 18:33). And for purposes of teaching and prayer they appear to have observed the days specially appointed in the Law. On the observance of the new moon cf. 1 Samuel 20:5; 1 Samuel 20:18; 1 Samuel 20:24. For its institution see Numbers 10:10; Numbers 28:11. In the latter passage is a description of the sacrifice to be offered; and we know from the Psalms (Psalms 81:3) that it was celebrated with the sound of the trumpet. On the observance when it came to be without any spiritual reality, see Isaiah 1:14.

It shall be well The Heb. word is literally -Peace". But it is used in salutations and enquiries after the welfare of another, as below in verse 26. Here however the woman appears to use it as a means of putting aside further questioning. So it would be equivalent to -Let be". -Say no more". -Let me have my way".