'Observe' in the Bible

“When you help the Hebrew women give birth, observe them as they deliver. If the child is a son, kill him, but if it’s a daughter, she may live.”

And ye shall observe the feast of unleavened bread; for in this selfsame day have I brought your armies out of the land of Egypt: therefore shall ye observe this day in your generations by an ordinance for ever.

And ye shall observe this thing for an ordinance to thee and to thy sons for ever.

When you enter the land that the Lord will give you as He promised, you are to observe this ritual.

The whole congregation of Israel is to observe it.

If an alien who resides with you wants to observe the Passover to the LORD, every male in his household must be circumcised, and then he may come near to observe it. He is to be like a native of the land, but no uncircumcised person is to eat it.

When the LORD brings you to the land of the Canaanite, the Hittite, the Amorite, the Hivite, and the Jebusite, which he swore to your ancestors to give you a land flowing with milk and honey you are to observe this ritual in this month.

"You shall observe a feast to me three times a year.

Observe the Festival of Unleavened Bread. As I commanded you, you are to eat unleavened bread for seven days at the appointed time in the month of Abib, because you came out of Egypt in that month. No one is to appear before Me empty-handed.

Also observe the Festival of Harvest with the firstfruits of your produce from what you sow in the field, and observe the Festival of Ingathering at the end of the year, when you gather your produce from the field.

“Tell the Israelites: You must observe My Sabbaths, for it is a sign between Me and you throughout your generations, so that you will know that I am Yahweh who sets you apart.

Observe the Sabbath, for it is holy to you. Whoever profanes it must be put to death. If anyone does work on it, that person must be cut off from his people.

Wherefore the children of Israel shall keep the sabbath, to observe the sabbath throughout their generations, for a perpetual covenant.

Observe thou that which I command thee this day: behold, I drive out before thee the Amorite, and the Canaanite, and the Hittite, and the Perizzite, and the Hivite, and the Jebusite.

“Observe the Festival of Unleavened Bread. You are to eat unleavened bread for seven days at the appointed time in the month of Abib as I commanded you. For you came out of Egypt in the month of Abib.

And thou shalt observe the feast of weeks, of the firstfruits of wheat harvest, and the feast of ingathering at the year's end.