The OT reveals in at least two ways that corporate worship of God took place both in the morning and in the evening:
“Now this is that which thou shalt offer upon the altar; two lambs of the first year day by day continually. 39 The one lamb thou shalt offer in the morning; and the other lamb thou shalt offer at even: 40 And with the one lamb a tenth deal of flour mingled with the fourth part of an hin of beaten oil; and the fourth part of an hin of wine for a drink offering. 41 And the other lamb thou shalt offer at even, and shalt do thereto according to the meat offering of the morning, and according to the drink offering thereof, for a sweet savour, an offering made by fire unto the LORD. 42 This shall be a continual burnt offering throughout your generations at the door of the tabernacle of the congregation before the LORD: where I will meet you, to speak there unto thee. 43 And there I will meet with the children of Israel, and the tabernacle shall be sanctified by my glory. 44 And I will sanctify the tabernacle of the congregation, and the altar: I will sanctify also both Aaron and his sons, to minister to me in the priest’s office. 45 And I will dwell among the children of Israel, and will be their God. 46 And they shall know that I am the LORD their God, that brought them forth out of the land of Egypt, that I may dwell among them: I am the LORD their God” (Exod. 29:39-46; cf. 2 Kings 16:15; 1 Chron. 16:40; 2 Chron. 2:4; 13:11; 31:3; Ezra 3:3).
“And these are the singers, chief of the fathers of the Levites, who remaining in the chambers were free: for they were employed in that work day and night” (1 Chron. 9:33).
In the contexts of both of the above passages, the people of God were involved in many other activities of divine worship, both corporately and individually. These passages, however, specify two corporate activities of worship that took place continually both at day and at night.
Do these passages provide at least some biblical rationale for the modern-day people of God to meet at least twice for corporate worship on the Lord’s Day, once in the morning and once in the evening?