Bereshis 28:20-22

And Ya'akov vowed a neder (vow), saying, If Elohim will be with me, and will be shomer over me in this derech (way, journey) that I go, and will give me lechem to eat, and beged (clothes) to put on, So that I return to bais avi in shalom; then shall HASHEM be for me Elohim (my G-d). And this even (stone), which I have set for a matzevah (pillar), shall be Beis Elohim: and of all that Thou shalt give me I will surely give the aser (tenth) unto Thee.