1.  Marriage Record:

2.  1840 Census Index and Digital Images (online at Ancestry.com; Image #1-2 of 10; extracted by Diana Gale Matthiesen):

1840

PA

Huntingdon Co.

Union Twp.

pp. 263B-264A

Ezekeal Corbin

210 001 - 320 001

0100000

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
2 males	4 or under	1835-1840	= Henry?/Harry? (b. 1838/9) = Asahel (b. 1835/6)
1 male	5-9	1830-1835	= Jesse (b. 1830)
1 male	30-39	1800-1810	= Ezekiel (b. 1802/3)
3 females	4 or under	1835-1840	= Margaret (b. 1840/1) = Sarah? (b. 1834/5)
2 females	5-9	1830-1835	= Martha (b. 1833) = Eleanor (b. 1832) = Ruth (b. 1830/1)
1 female	30-39	1800-1810	= Hannah (b. 1802/3)
1	person engaged in agriculture

Listed next to Amon CHILCOTT, who is next to Elijah DEAN, who is next to Asa CORBIN.  Other CORBINs in Union Twp.:  Caleb and Ferdinand. 

3.  1850 Census Index/Microfilm (online at GenealogyLibrary.com):  Union Twp., Huntingdon Co., PA, p. 197A, 4/4, enumerated 30 Sep 1850 (extracted by Diana Gale Matthiesen):

Ezekiel Corbin	47	M	Farmer	350	Penna
Hannah    "	47	F			"
Jesse A   "	20	M	Labr		"
Ruth      "	19	F			"
Eleanor   "	17	F			"
Martha    "	16	F			"
Asahel    "	14	M			"
Henry?    "	11	M			"
Margaret  "	9	F			"
Mary A    "	7	F			"
Westley   "	5	M			"
Selina B  "	3	F			"
Sarah     "	15	F			"

I'm assuming that Sarah is out of order deliberately, which would indicate she is not their daughter.  That she is not is supported by the spacing of Martha and Asahel.  Three children in three years is not impossible, but it would be unusual.  Listed three households from Eliel & Eleanor (CORBIN) SMITH. 

4.  LDS.  Family Search: Internet Genealogy Service: Ancestral File.